I am open to correction here but not sure 98 will ''see'' this in the send-to options.
Anyways - I'd suggest that if you can ID your flash drive in win explorer or my computer, then either rightclick ''copy'' files to copy stuff (or cut to move) from original source, and then rightclick ''paste'' into the flash drive. Drag and drop should work too.
A reminder tho probably not needed ... from keyboard - ctrl+c = copy, ctrl+v = paste and ctrl+x = cut.
Also re drag and drop - if working in same drive default is ''move'' - if drive to drive default is ''copy''. Use of CTRL key can be used as needed to reverse either of these.