As ADFs are 880KB you cannot transfer them "natively" to an Amiga on a PC Floppy Diskette.
The Amiga can certainly read 750KB PC Diskettes with cross dos (WB2.0+) but not 1.44MB diskettes.
BTW: You cannot format 750KB PC disks on WinXP or above.
If you have a Win95/98PC you can format a PC Diskette at 750KB and read it on Amiga 500 with Workbench WB 2+ with cross dos.
You could also zip or lha an ADF file to be less than 750KB (IE:Fits on a 750 diskette) But unless you have a Hard Disk on the Amiga 500 its going to be very dificult to reconstitute the ADF file to an 880K Amiga Diskette.
Options are TRANSADF or other cable based connections.
Basically if you just want to play a few Amiga 500 games on a standard 1MB amiga 500 you need an Amiga Buddy with a Hard Drive and CD Rom Amiga to create the A500 Games for you from your PC files. Thats the easiest.