>>If you have 100,000 files, you don't need to split it in 2, but in 10 or 100 pieces, to get folders of reasonable size. What kind of information do the files have? Is there a possibility of splitting by filename? E.g., by first letter of filename.

our current code ,expects only 2 folders(ie. active and inactive). these files do contain crucial clinical info but names of these files can be anything as we control them.

>>Do you already use NTFS, or do you have an older filesystem? Or an entirely different filesystem, like a Linux server?
yah! its new PC with XP os. file system NTFS.