System 7: Sharing Files with a System 6 Macintosh

Yes. To set up your Macintosh computer to share files, documents, or
folders, follow the instructions on setting up file sharing in the
Macintosh User's Guide or search for other articles on the subject. You
can share folders with any Macintosh (from the 512k enhanced and up), the
Apple II, and any MS-DOS computer that uses AppleShare workstation
software. Apple II and MS-DOS computers require special software and, in
some cases, hardware.