Windows 7, 64 bit, acer AS5552-N974G32Mnkk. I normally don't do any "backup" But when I tried it wasn't working. I use a USB 3 powered 1 terabye drive as my destination. Unfortunately almost all of the copied files became corrupted. The USB drives have no problem with my 2 other Win7 32 bit machines. The only difference is this is an Acer and is 64 bit. I did some Google search. It seems like others are experiencing similar problems. Files got corruped when copying from HDD to an external USB drive. I tried changing from the default Quick Removal to Better Performance to no avail. The only time that it did copy correctly was when right after I rebooted the machine, but then I couldn't conclusively say 100% that's they were all good as I have 100s and thousands of copied files, but I think they were as all the JPEGs file I checked looked good. Other times, many of the files were corrupted to the extent that chkdsk /f would have to fix it and in the end, the whole USB drive demanded a format to be able to use again. I once spent like 10 hours formatting the drive. Now I dare not try to do a copy again using the Acer as it may very likely corrupt the entire drive again.
I checked Acer's website, there doesn't seem any update for that particular model and my BIOS is the latest. Since the drive works flawlessly with at least 2 other machines, so I tend to think the ntfs FORMATTED USB drive isn't the culprit.
It's been very frustrating.
I used robocopy to do it
for %%x in (jpg nef avi mpg pdf doc mov m4a mpeg jpeg) do robocopy c:\Users\yyy i:\acer\yyy *.%%x /MT:20 /xo /s /z /r:0 /w:0 /v /tee /log+:i:\acer\yyy\robocopy.log
Appreciate any help.
Thanks.
