I used what's easiest for me.. (and i can dump the same images to multiple drives).. and because the docs said it was limited to 512M (and since these are all 8088 machines w/ DOS 6.22). I'm on a Mac not windows, so I have to use a VM for the fdisk/format, for ease. When i first tried this, I didn't know what would work and not work since the prior threads were all old and had minimal success. I'd rather have the speed .. the "messing with images' wasn't a pain nor time consuming.. it took me 5 minutes, and i have a template image now that has DOS on it, that i simply write to any usb stick and move on. (I have no need for > 512M on an 8088 machine, which is all I use these USB cards for).. When I looked at the Lo-tech cards eons ago.. and with nothing available and the bios having been 'alpha'.. that's why I went the aliexpress route. To each their own I guess. I'll be continuing to help test whatever mods/patches come about (including any possible patches to the BIOS since I like being able to boot from the USB stick(s)) instead of just treating it as a dump drive. These cards are cheaper and I can use any old usb stick.. whereas things like XT-IDE/CF need (getting harder to find) CF cards and cost twice as much (even to build) as this card. Something to note.. _unless you fix the geometry yourself_ it's wrong inside the driver and/or the bios, and you have to patch that yourself, it's locked to different geometry specs (which is probably what the 1.9A is using).