Windows 7 - How To Move Large Files To External HD
Jan 28, 2012I have a 30 GB file on my desktop and I want to move it to an external hard drive. In Win 7 it just won't go! Cut/paste, move to, nothing. How can it be done?
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Windows 7 64-bit Corrupting Large Files Copied To External NTFS Drives?
Jan 26, 2012a number of backup copies of large files on external USB-connected NTFS drives differed from the source versions still on my hard drive. I also discovered that I could reproduce the issue with newly-copied files.Here are the specifics of the issue, following a series of experiments:
- On my system, copies of large files, files typically larger than 500MB, are corrupted (altered) roughly 30% of the time when copying them under Windows 7 64-bit to USB-connected NTFS-formatted external drives.
- No error occurs / no error message appears during the copy
- The file size of copy is always identical, whether or not data was altered during the copy process.
- File differences are confirmed via either the command-line "FC" command or a utility such as WinDiff
- The issue impacts copies made via the Windows GUI -OR- via command-line copy or xcopy
- The issue occurs with multiple external USB NTFS-formatted drives, no matter what make or model.
- Subsequent attempts to copy an affected file will ultimately yield an identical copy. This would seem to rule out interference by an external program such as an anti-virus program (and the only AV I am running is Microsoft Security Essentials)
- The USB drives involved pass error checks, and copies made to these drives on other (non Windows 7) systems produce identical copies
- So far, the third party utility "TeraCopy" manages to consistently produce clean copies, and therefore is a temporary workaround. This utility apparently works because it, by default, bypasses the NTFS memory caching operation used by the Windows 7 OS...a caching system which I have so far found no way of disabling.
- The problem does not appear to impact relatively small files (1 to 100MB or so). I have not found any particular threshold, but I have seen the issue impact numerous files in the 500MB neighborhood.
- The problem seems to date at least to the version of Windows 7 that was in release as far back as the Fall of 2010, as I discovered corrupted backup copies of files dating back that far. Again, the files are corrupted with respect to the original copy...NOT with respect to file structure itself.
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Jun 2, 2011Greetings Again,
My file and storage system is set up like this:
C: Drive - 120 GB SSD This is my Win 7 64-Bit Ultimate Boot drive. It has my most important Microsoft programs on it. Out of the 111GB available, I've used 42GB, leaving me 69GB free space. I want to keep this area open.
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I attached a screen shot of the error message and network monitor.
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