I can't count how many times that gets corrupted.
Also, try another USB 2.0 cable. Be sure it is such a cable.
Is this drive USB powered? Try a powered USB hub rather than the laptop USB power as source.
I have an irritating issue with the above (hardware listed below) which is used as a backup/archive.
When I copy files - photos, music, apps - to the drive I find that some files have become corrupted. There is no error message, nor are errors found with various disk-checking utilities. I only realise when I open a photo (an eg bottom half will have colour shifted), music (will skip at some point before end of track) or an app (will just warn is corrupted).
The same errors do not occur when I make a similar transfer of files to external USB stick/SD cards (same machine, files, port).
I have tried Chkdsk, formats, partitions in their fullest forms. Nothing wrong. I have tried Norton Disk Doctor, Seagate Seatools (their own disk-checking utility) etc. No problems according to them.
When I copy back the files to the hard drive on the original machine, they are still corrupted.
Alas I do not have a machine that supports external USB drives at start-up so Seagate's own boot level disk utility has not been an option so far. Maybe a zero fill or low-level format is a sensible next option?
I must confess I do not know the process by which data is transferred, written and verified however it seems to be a problem with data being written?
I'd welcome any thoughts and/or answers as it has become very frustrating. Obviously if I cannot trust the integrity of data being backup up then I cannot use the device. I would, at the very least, wish to pinpoint the source of evil - hard drive fault or enclosure..not knowing is half the frustration.
Generic USB2.0 external enclosure with Seagate Momentus 40GB 2.5in drive 5400RPM 8MB cache
Various PCs all running XP Pro SP2, up-to-date, clean, USB2.0
Mostly used with Sony Z1XSP, 1.7 Centrino, 1GB/80GB