OPINION AND ORDER
SHIRA A. SCHEINDLIN, District Judge:
I. INTRODUCTION
On September 22, 2011, a jury found Mark Healey guilty of transporting, distributing, and possessing child pornography in violation of 18 U.S.C. § 2252A. On November 4, 2011 he moved for a new trial pursuant to Federal Rule of Criminal Procedure 33, arguing that “the cumulative impact of the Government’s multiple discovery violations was so serious a detriment to the defense’s preparation for trial and the construction of a defense strategy as to deny Mr. Healey due process and a fundamentally fair trial.”1 Healey also argues that the Government failed to correct the false and contrived testimony of a key witness and that the prosecutor then personally and vociferously vouched for that witness’s credibility. As a preliminary alternative to a new trial, Healey seeks an evidentiary hearing in order to determine whether the witness perjured himself.2 For the reasons explained below, Healey’s motion is denied.
II. BACKGROUND
A. Defense Counsel’s Access to Computer Evidence
The Government seized three computers that had belonged to Healey. The parties refer to them as “the Dell Laptop;” the “Encrypted Hard Drive,” which had been removed from defendant’s desktop Macintosh computer; and the “Imaged Hard Drive,” which was seized from the apartment of Healey’s boyfriend and was a backup copy of the Dell Laptop.
In late June of 2011, defense counsel asked the Government to provide it “with mirror images of the hard drives from which child pornography would be redacted.” 3 The Government refused to create copies of the hard drives. Instead, the Government said that it would make arrangements for defense counsel “to inspect any of this evidence,” and “to make copies of any materials, other than child pornography itself, to which the defendant is entitled under Federal Rule of Criminal Procedure 16.”4
After entering the FBI’s offices and being relieved of all electronic devices, de[266]*266fense counsel was “permitted to examine copies of the hard drives while [FBI] Agent Spivack sat in the same small room.”5 However, at defense counsel’s request, the Government sent a mirror image of the hard drives to its offices in Portland, Oregon, so as to facilitate extensive examination by the defense’s Portland-based computer expert, Robert Young.6 Young was permitted to examine the hard drives outside the presence of any FBI agents, to obtain material (other than child pornography) from the computers, and to use his own programs to analyze the computers.7
B. Third Parties’ Access to Healey’s Computers in 2010
Because there was no dispute that the computers at issue belonged to Healey and contained child pornography, both parties understood that “the central issue at trial would be whether any child pornography recovered from these devices was placed on them by Mr. Healey or by a third party.”8 Two of the computers — the Encrypted Hard Drive and the Dell Laptop — ■ were removed from Healey’s apartment on June 2, 2010 by Neal Cotton, Healey’s roommate, and were seized by the FBI on June 8, 2010.9 Whether child pornography was added to the computers over those six days was therefore a crucial issue.
The Government initially believed that nobody had attempted to access the Encrypted Hard Drive or the Dell Laptop during that time. In the days just before and during the beginning of trial, it learned otherwise and informed defense counsel of this information.10 On the basis of this last-minute development, Healey moved for a mistrial or, in the alternative, a continuance.11 He was granted a continuance.12
C. Testimony of Cotton
Cotton testified that he had no interest in pornography.13 Defense counsel subsequently found sexually explicit photos on Cotton’s Google profile. When he was recalled to the stand, at defendant’s request, Cotton explained that the photos were personal pictures of ex-lovers and that he did not consider them to be the same as pornography.14 In his summation, the prosecutor told the jury that Cotton is a “man who, whatever his flaws, came here because he had to come here, and he told you the truth.”15 After defense counsel argued to the jury that Cotton had lied under oath,16 the prosecutor repeated his argument that Cotton “wasn’t lying to you.”17
III. APPLICABLE LAW
Federal Rule of Criminal Procedure 33 (“Rule 33”) states that “[u]pon the [267]*267defendant’s motion, the court may vacate any judgment and grant a new trial if the interest of justice so requires.”18 A conviction should be reversed “only with great caution and in the most extraordinary circumstances.” 19 When based upon the Government’s alleged use of perjured testimony, a Rule 33 motion
must establish the following: (i) the witness actually committed perjury; (ii) the alleged perjury was material; (iii) the government knew or should have known of the alleged perjury at time of trial; and (iv) the perjured testimony remained undisclosed during trial. When the perjury was disclosed during the trial, a new trial should not be granted. As long as the jury is alerted to a witness’ lies, the jury — the appropriate arbiter of the truth — can sift falsehood from fact and make its own credibility determinations.20
“A witness commits perjury if he gives false testimony concerning a material matter with the willful intent to provide false testimony, as distinguished from incorrect testimony resulting from confusion, mistake, or faulty memory.”21 “Whether the introduction of perjured testimony requires a new trial depends on the materiality of the perjury to the jury’s verdict and the extent to which the prosecution was aware of the perjury.”22
Prosecutors may not vouch for their witnesses’ credibility.
In other words, a prosecutor is prohibited from expressing his or her personal belief or opinion as to the truth or falsity of any testimony or evidence or the guilt of the defendant.... An improper remark by a prosecutor will justify a reversal by the Court only if it causes the defendant substantial prejudice by so infecting the trial with unfairness as to make the resulting conviction a denial of due process.23
If the defendant does not object at trial to the prosecutor’s remarks, his demand for a new trial must be rejected unless it “ ‘seriously affects the fairness, integrity, or public reputation of judicial proceedings.’ ”24
Rule 16(a)(1)(B) requires that “[ujpon a defendant’s request, the government must disclose to the defendant, and make available for inspection, copying, or photographing” any relevant written or recorded statement by the defendant if the statement is within the government’s control and the prosecutor knows or should know that it exists. Rule 16(a)(1)(E) requires that “[u]pon a defendant’s request, the government must permit the defendant to inspect and to copy or photograph books, papers, documents, data, photographs, tangible objects, buildings or [268]*268places, or copies or portions of any of these items,” if the item is within the government’s control and the item is material to preparing the defense, the government intends to use the item in its case-in-chief, or the item was obtained from or belongs to the defendant. Finally, Rule 16(a)(1)(G) requires that the government give the defendant a written summary of any expert testimony that the government intends to use under Federal Rule of Evidence 702, 703, or 705.
If a party fails to comply with Rule 16, the court may order discovery, grant a continuance, preclude the introduction of evidence, or enter any other just order.25 “The trial court has broad discretion to fashion a remedy for the government’s violation of [Rule 16].... The district court’s admission of evidence following a violation of Rule 16(a) is not an abuse of discretion requiring a new trial unless the violation caused the defendant substantial prejudice.”26
C. Jencks Act
The Jencks Act, also known as Section 3500, requires that “[a]fter a witness called by the United States has testified on direct examination, the court shall, on motion of the defendant, order the United States to produce any statement (as hereinafter defined) of the witness in the possession of the United States which relates to the subject matter as to which the witness has testified.”27
D. Adam Walsh Child Protection and Safety Act (“the Walsh Act”)
The Walsh Act, signed into law in 2006, imposes the following prohibition on the reproduction of child pornography during criminal proceedings:
(m) Prohibition on reproduction of child pornography.
(1) In any criminal proceeding, any property or material that constitutes child pornography (as defined by section 2256 of this title) shall remain in the care, custody, and control of either the Government or the court.
(2) (A) Notwithstanding Rule 16 of the Federal Rules of Criminal Procedure, a court shall deny, in any criminal proceeding, any request by the defendant to copy, photograph, duplicate, .or otherwise reproduce any property or material that constitutes child pornography (as defined by section 2256 of this title), : so long as the Government makes the property or material reasonably available to the defendant.
(B) For the purposes of subparagraph (A), property or material shall be deemed to be reasonably available to the defendant if the Government provides ample opportunity for inspection, viewing, and examination at a Government facility of the property or material by the defendant, his or her attorney, and any individual the defendant may seek to qualify to furnish expert testimony at trial.28
IV. DISCUSSION
A. Disclosure of Non-Pornographic Data Under Rule 16
Healey argues that the Government failed to comply with its Rule 16 obli[269]*269gations. First, he argues that the Government “did not produce [to the defense] the non-pornographic materials found on Mr. Healey’s computers.”29 Second, he argues that “the notion that [defense] counsel could even adequately ‘inspect’ (let alone copy or photograph) the extraordinarily large and complex files of a computer by examining it at the FBI offices in the company of Agent Spivack defies reality.” 30
It is common practice for the Government to produce to defendants copies of Rule 16 material, either in digital or paper form. But it is not required by the terms of the rule. Rather, Rule 16 requires that the Government disclose the material and make it available for inspection, copying, or photographing. Therefore, Healey’s repetitious claim that “[pursuant to Rule 16, the Government was required to produce this data to the defense,” is incorrect.31
Healey also argues that the Government did not give him a fair opportunity to inspect the relevant non-pornographic materials. The parties agree that performing forensic examinations of computers is a daunting and difficult process that takes a long time and requires real expertise. Healey argues that “[t]here is simply no way this task could have been adequately accomplished [by defense counsel and the defense’s expert] under the highly restrictive conditions imposed by the [Government.” 32
But Healey does not explain why the conditions imposed by the Government were improper. He does not allege that the Government limited the amount of time that his counsel or expert could spend with the material, made the scheduling of those inspections difficult, refused to permit his expert to copy the material, or in any other way deprived him of his right to inspect and copy as required by Rule 16. The fact that the computers seized from Healey contained a large amount of material does not mean that the Government’s form of disclosure was improper.
Healey has placed emphasis on a November 21, 2009 webcam video (“the November 21 video”) that was particularly helpful to the Government because it showed that the defendant was engaged in chat room conversations regarding pornography. Healey argues that this video was a “recorded statement by the defendant” subject to disclosure (or what he calls “production”) under Rule 16(a)(l)(B)(i). But, as the Government points out, even assuming that a silent video of a defendant can be considered a recorded statement, “the Government is not required to preview its case or identify which pieces of evidence it believes will be most persuasive.” 33 In the Brady context, “the Government is under no duty to direct a defendant to exculpatory evidence within a larger mass of disclosed evidence,”34 even when that larger mass is enormous, and defendant points to no authority suggesting that inculpatory evidence disclosed under Rule 16 is any different. The Government mentioned the video at a pre-trial [270]*270conference on July 6, 2011 and the defense had access to it.
At that July 6 conference, defense counsel informed the Court that he and his expert needed more time to perform the necessary forensic examination of the computer evidence and prepare an adequate defense.35 However, defense counsel’s request was based on the complexity of the material, not his lack of access to it. Counsel acknowledged that he had physical access to the computers since March 3, 2011.36 At no point during that conference or afterwards did counsel request that the Court order a change in the conditions of defense’s access to the evidence. Instead, defense counsel requested more time and received a six week adjournment.
In order to vindicate both the rights of criminal defendants and the public policy against child pornography, the Walsh Act requires that the Government provide defendants and their attorneys and experts “ample opportunity for inspection, viewing, and examination [of the child pornography] at a Government facility” and simultaneously prohibits the Government from producing copies of the illicit material to defense counsel.37 Parties and courts have taken different approaches to handling the inherent difficulties in the discovery phase of a child pornography prosecution. In this case, for example, the prosecution sent a mirror image of the computers to Oregon to facilitate analysis by defendant’s expert at the FBI office there. In contrast, in United States v. Knellinger, the court accepted the defendant’s argument that it would be exorbitantly costly for his experts to perform the necessary examinations inside the Government’s facility and that the Government could not therefore provide the defense with a legally sufficient opportunity to inspect the material.38 The court therefore ordered the Government to provide the defense with copies of the hard drives, including copies of the child pornography, subject to appropriate protective orders.
Healey cites United States v. Cameron for the proposition that under Rule 16 and the Walsh Act, the Government must produce to the defense material other than child pornography from a computer that contains child pornography.39 Although it is true that the court in Cameron ordered the government to produce stored emails and connection logs that had been produced from the third-parties Yahoo! and Google, the court also made clear that the government did not have an obligation to remove child pornography from the defendant’s online photo albums and produce the non-illicit photos.40 Additionally, the Cameron court held that the government’s position — that defendant’s counsel and ex[271]*271pert could examine and conduct tests upon the defendant’s hard drives containing the child pornography only within the confínes of a government facility — complied with the Federal Rules of Criminal Procedure and the Walsh Act.41
Healey’s counsel had access to the computers at issue from March until September of 2011. When defense counsel asked for additional time to prepare for trial, he received a six week adjournment. But he never told the Court that the Government’s terms of access were problematic or that he could not adequately inspect or copy the computer files. Counsel had ample opportunity to examine and analyze the computers at issue and cannot now claim a denial of his right to a fair trial after silently acquiescing to the terms of access for six months.
B. Failure to Produce Trial Exhibit 33 in Advance of Trial
Healey argues that because the Government failed to produce the November 21 video as an exhibit prior to trial, it should not have been admitted and its admission merits a new trial.42 The Government responds that it informed defense counsel in writing that it was not producing electronic exhibits but was instead describing their content and would permit him to review them.43 At trial, I informed the Government that it should have produced the electronic exhibits in full.44 However, the Government’s failure to produce the November 21 video was somewhat mitigated because it did produce, in a timely fashion, a PowerPoint presentation that was made up of the relevant screen-shots from the video. The failure was further mitigated because after the video was presented to the jury, defense counsel had a three day weekend to consider its impact and prepare for the cross-examination of the relevant case agent, a cross examination that lasted two days.45 In combination, these two mitigating factors eliminated the prejudice that resulted from the Government’s failure to produce the exhibit before trial.
C. Late Disclosure of Expert Testimony
Healey argues that the Government’s delay in disclosing expert testimony, with regards to the three different computers, caused him substantial prejudice. It is true that the Government discovered the evidence underlying the testimony rather late in the trial, which caused delay and confusion. But the Government disclosed the information as soon as it was discovered and thus complied with its obligations. Most importantly, there was no prejudice to defendant because of the content of the information.
1. Activity on the Dell Laptop
Between June 2, 2010 and June 8, 2010, 154 crash log files were automatically created on the defendant’s Dell Laptop (which was not in his possession at the time) as a result of a system shutdown. These files were not created by a human being and no other files were added to the Dell Laptop between those dates.46 Healey argues that the Government should have disclosed this information to defense counsel pursuant to Rule 16 — apparently because at one point the Government agents ' mistakenly thought that the files may have been created by a human. However, Rule 16 does [272]*272not create an obligation to disclose all pri- or statements of a Government witness (an obligation that the government complied with under Section 8500) and there was no Rule 16 violation with respect to this information.47
Between June 1, 2010 and June 7, 2010, there were four unsuccessful attempts to log in to the defendant’s Dell Laptop, which was password protected. The Government’s expert, Stephen Flatley, only discovered these attempts after trial began.48 On September 14, 2011, the Government disclosed this information to defense counsel, along with the fact that “no substantive files were created, altered, or deleted during this period.”49 This information should have been discovered and disclosed by the government before trial; however, because the prosecutor informed defense counsel as soon as he learned of it, there was no violation.50 Additionally, the information was not material: the fact that there were unsuccessful attempts to access the computer does not undercut the Government’s allegation that the files on the computer belonged to Healey. The late disclosure caused Healey no prejudice.
2. Access to the Encrypted Hard Drive
On September 14, 2011, after the trial had begun, Flatley informed the prosecutor that while reviewing data in anticipation of his testimony, he had discovered that the defendant’s Encrypted Hard Drive had been plugged in to a computer — presumably in order to view the files on the encrypted' hard drive — between June 2, 2010 and June 8, 2010, when the drive was not in the defendant’s possession.51 The prosecutor told Flatley to collect the details of these attempts.52 Flatley determined the attempts to access the encrypted hard drive were unsuccessful and no files were altered.53
The Government submits that the Assistant United States Attorney informed defense counsel of this new information by telephone on the evening of September 14 and walked defense counsel through Flatley’s anticipated testimony.54 Healey does not concede that such a conversation took place.55 The Government’s version of events is bolstered by the fact that he described the phone conversation in court the next day and defense counsel did not dispute the account.56
As I explained during trial, once again the problem was not a matter of the Government’s disclosure obligations.57 The prosecutor disclosed the information to defense counsel as soon as he learned of it. The problem was that the Government created new information after the trial began. ' However, none of the charges [273]*273against Healey were based on evidence from the Encrypted Hard Drive.58 And, as a result of the last-minute change in Flatle/s testimony, the prosecution conceded that it would not introduce evidence from the drive under Federal Rule of Evidence 404(b) to show similar bad acts by the defendant.59 Therefore, the only potential impact of the new information was that it might impeach the testimony of Cotton, who had control of the Encrypted Hard Drive between June 2, 2010 and June 8, 2010 and testified that he never tried to access the hard drive. In order to permit the defendant to develop this line of argument, I granted a continuance and permitted defense counsel to recall Cotton for cross examination. Defense counsel then had a three day weekend to prepare for that examination. He questioned Cotton extensively in light of the new revelations. Because the new information was actually somewhat beneficial to the defendant, because it did not materially impact the substantive evidence against the defendant, and because defense counsel had sufficient opportunity to argue that it should lead the jury to have reasonable doubt, it did not substantially prejudice Healey and is not a reason to grant a new trial.
3. Makeup of the Imaged Hard Drive
A third hard drive — called the Imaged Hard Drive — was a backup copy of defendant’s Dell Laptop. During the September 6, 2011 pre-trial conference, the prosecutor said that “[Healey] used this hard drive to back up his computer. As a result, the copy is a mirror image in many ways. It is identical.”60 The case agent determined before trial that in fact the Imaged Hard Drive was slightly different from the Dell Laptop in some immaterial ways. This new understanding was conveyed to the defendant before trial in accordance with Section 3500 and defense counsel cross examined the case agent about how his understanding changed.61 There was no Rule 16 violation and no prejudice to the defendant.
D. Testimony of Neal Cotton
Healey argues that Cotton committed perjury by repeatedly asserting that he has no interest in pornography62 and that the prosecutor failed to correct this testimony and then personally vouched for Cotton’s truthfulness in his closing argument.63 The Government argues that Cotton did not commit perjury, that the topic of the alleged perjury was collateral to Cotton’s testimony against Healey, that the jury was properly presented with all of the relevant evidence regarding Cotton’s credibility, and that there was abundant independent evidence of the defendant’s guilt even without Cotton’s testimony.64 Additionally, the Government argues that it did not vouch for Cotton.
When confronted by defense counsel about the sexually explicit photos on his Google profile and his previous statement that he was not interested in pornography, Cotton gave a debatable but plausi[274]*274ble explanation: that he does not consider personal photos of lovers engaged in sexual acts to be pornography, in contrast to depictions of sex between anonymous paid actors for a third party’s entertainment.65 Defense counsel cross-examined Cotton on this point extensively66 and argued strongly in closing statements that, as a result of this testimony, Cotton had no credibility. The defendant cites various cases for the proposition that perjured testimony merits a new trial if it might have or probably would have altered the verdict had its falsity been disclosed to the jury. But that is not the appropriate standard when the evidence of perjury was presented to the jury, as it was here.67 Because the jury was alerted to Cotton’s alleged dishonesty, it was able to “sift falsehood from fact”68 and make its own credibility determinations. Healey argues that the Court should conduct an evidentiary hearing to determine whether Cotton committed perjury. Such a hearing is unnecessary here, where the core questions that the defendant seeks to address were already raised at trial and presented to the jury.
The prosecutor repeatedly argued to the jury that Cotton had told the truth. The American Bar Association’s standard for Criminal Justice, which the Second Circuit has cited approvingly, says that in closing arguments, “[t]he prosecutor should not express his or her personal belief or opinion as to the truth or falsity of any testimony or evidence or the guilt of the defendant.”69 “The prosecutor is of course entitled to argue forcefully and vigorously to the jury in support of her witness’s credibility. But the argument must be based on evidence in the record.”70 Here, the prosecutor argued for Cotton’s truthfulness, but he did so based on corroborating evidence and the jury’s “common sense,” not on the basis of his own credibility as a representative of the United States. Furthermore, defense counsel did not object to the prosecutor’s remarks at the time they were made, which would have allowed the Court to instruct the jury to treat them as argument, not evidence. The prosecutor’s remarks did not cause the defendant substantial prejudice and did not seriously affect the fairness, integrity, or public reputation of the judicial proceedings. Reversal is therefore inappropriate.71
V. CONCLUSION
For the reasons stated above, Healey’s motion for a new trial or an evidentiary hearing is denied. Sentencing is scheduled for May 7, 2012 at 4:30 p.m.
SO ORDERED.