The standard to which you're referring, UFI, supports only 3 media types, all of which are 3.5". It is no use for 5.25" disks. The broader Mass Storage Class is also no use because the built-in OS drivers for MSC assume that the device has a single media type or the hardware can auto-detect the media type. We use a vendor-specific command set so the host can specify parameters to read a variety of formats, including non-PC formats.
The physical track format is different between 3.5" and 5.25" drives. Our product is intended for use with 5.25" drives only. Please do not purchase our product for use reading 3.5" disks. USB 3.5" floppy drives were commercially available from TEAC and Y-E DATA.
Thanks for all the interest. Our shipping operations are temporarily stopped due to COVID-19 so please do not order if you expect to receive your order promptly!
The stay-at-home order in our area is "until further notice" with no expiration date. We can't provide an estimated ship date.
