It just occured to me that this is an FAT32 drive I'm attempting to copy to. I keep this one drive FAT32 because I use it to copy files from my Mac to my work PC. Does anybody know if Apple removed write to FAT32 support in Lion?
Edit: Nevermind, I just tested my other external drive which is Mac OS Extended (Journaled) formatted and I get the same results.
I have the exact same issue! Whats the deal...
Cant copy too or from any type of external drive. This is ludicrous!
File appears for a split second then dissapears. I coppied a document to a usb drive and left to work, plugged in my usb drive and whoops! I thought to myself "No way i remember copying it"
Luckily i had also saved to dropbox!
Apple do something!
Tried mac journaled and FAT32...no luck.
I had a similar problem yesterday and stumbled upon a simple fix.
TO FIX THIS PROBLEM, all I had to do was to "Repair Disk Permissions" using Apple's own DiskUtility. Somehow the disk permissions on my main drive were corrupted. As soon as these were fixed, I could write between drives again.
For good measure, I verified the disks and the disk permissions on all my drives.
By the way, a simple re-start DID NOT FIX the problem for me.