ok so I did do a search on this problem, but i started a new thread b/c I think i may be having a slightly different issue...please hear me out.. I have a Macbook, running Mac OS X Tiger (version 10.4.11). I have had a 500 GB external HD (MyBook) hooked up to it (via USB) for the past 4 months or so, never really had any issues, was always able to transfer files, no problem. However, today i suddenly ran into some serious problems. I tried to transfer some pictures to the external drive and after copying 200 or so files it gave me an error, said a specific file could not be transferred (specifically it said "the Finder could not complete the operation because some data in "IMG_3435.JPG" could not be read or written. Error Code - 36 "). At first I thought maybe that specific file was corrupted or something but i checked it out and it looked fine. So I then I tried transferring another folder of pictures, and then I got the same error right away (after transferring 3 files), for a different file. And now i'm at the point where I can't transfer ANY files to my external HD anymore! (T_T). And it's weird, when i transfer folders, it will transfer the folder itself but not the files. Strange.. I'm so confused because it was all working fine before for months, and now, it all of the sudden doesn want to copy files to the external drive. (?) my question is, what is the problem here? What are my options for solving this? is it my external drive, or is something wrong with my MacBook? Space is not an issue here, as there is plenty of space on external drive for the files to be copied. And I NEED to transfer files from my Macbook to an external drive because my MacBook HD is going to fill up any day now (currently have 3.5 GB free on a 74 GB HD...my macbook is about 2 years old). Oh and i should mention, i just checked and the formatting for the external HD (the Mybook) is MS-DOS FAT 32. It currently has about 350 GB free. In another thread about this problem w/ transferring files, someone mentioned external hd's with MS DOS FAT 32 not being ideal for use with Macs, and recommended reformatting it. I just not sure if I should do this right away though, because my husband uses the external drive as well to backup stuff from his PC (so it's not being used exclusively for Macs). However if this is really the only solution then I'll just go out and buy another one to use exclusively for my MacBook and reformat it... thanks in advance for any tips/suggestions!!