[netyuppie]

pc or mac?
if pc, goto my computer, and right click on the drive having the problems (well, the drive with the files having problems) and goto properties, tools tab up top, and click "defrag now"
what it does is, when a file is saved to your computer, all parts of that file arent saved to just one spot on the physical drive. defragment will reorganize the drive so that the common pieces of files are closer together. it wont rearange any of your files location (files in any given folder will still be in that folder) you should run a full disk defrag on each drive at least once a month. it can take some time, depending on the size of the drive & how badly fragmented it is, so plan on running it over night or while your at work.

also, what bt client are you using?