Hi Laura, hope you had great T-Day! First off, what version of OSX are you using? Anything after Snow Leopard is just not going to work if you’re formatting the floppy from the MAC side. You’ll have to boot to your Win 7 side and format as a 720K disk. I tried using a 1.44MB disk and version 4.02a of CrossDos on the Amiga Format disk won’t read 1.44MB disks. I don’t know if newer CrossDos versions work with 1.44 disks.
To format a 1.44MB disk as 720K in Windows press the Start Button and type CMD. Right click on CMD and “run as administrator”.
Type: format A: /FS:FAT /T:80 /N:9 this will format the 1.44 floppy as 720K. Be sure to put tape on the left side hole.
Now here’s the catch with ADFs. Most are 880K and won’t fit on the 720K formatted floppy. However, if you zip the ADF first (in my test case 880K ADF compressed down to 632K) it will fit but you’re going to have get an Amiga UnZip program on a floppy also to unzip the ADF - I would assume to RAM:
Second, I have the exact same Amiga Format disk #8 and went thru the procedure with a 720K formatted disk.
1. Loaded the CrossDos file by double clicking the Attach.DI0 icon. Once successfully loaded the program responded with “Done”.
2. Inserted the 720K floppy and it was read just fine (with the zip file) however with two icons. One displayed the disk as Unrecognizable and a second as the title of the 720K floppy (named TEST) that I could open - no problem. Odd. Like Matt said "Windows doesn't really handle USB floppy drives very well" except for transferring files.
That’s about it really. Maybe someone else could add to this for additional help?
At least if you just write a zip file under 720K to the floppy using Windows you'll be able test thru to a visible disk on the Amiga. Hope this helps a little.