I use a ZIP drive and a 1.44 floppy drive to store financial information. I
keep duplicate files on the floppy. The Zip drive is the primary storage.
After saving the open file to the Zip drive, using "File"-"save-as"-"drive A"
for the backup file to be saved to floppy, I get to "File already exists,
replace? Yes, No". Accepting the overwrite, the program writes a temp file
to the floppy and never replaces the original file. The program locks up
displaying a hourglass but all floppy activity ceases. Complete system
shutdown is required to recover from lock up.

Win2000, excell2000, all latest updates.

Commodore