Because the Wintech SAK-65 is a suitable IDE to SATA bridge that fools the emu it could be used to hookup any SATA HD.
The connection could be to an internal drive or a drive bay mounted in place of the floppy drive like this.
Icy Box IB-2216StS (1x 2.5 inch) SATA Mobile RackAmazon £17.17 & FREE Delivery
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I think this looks sturdier and smarter than the Icydock IDE bay that I have used to mod my ultra.
Once the bay is installed you could slide in a standard SATA 2.5 HDD or a SSD
or how about this novel idea.
Syba Compact Flash to Dual Interface SATA II and USB 2.0 2.5 inch Adapter Amazon £19.99 & FREE Delivery
Same form factor and connections as a 2.5 HD but it takes a CF card. This could slide in and out of the bay and hook straight into a PC via the
built in USB port. Requires no drivers, it should work.
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Or if you only want a CF card bay in place of the FDD maybe this would work?
Startech 3.5 inch SATA to CompactFlash SSD Adapter Card for 3.5 Drive BayAmazon £19.58 & FREE Delivery
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The Wintech 93205-GB SATA to IDE Converter is available from Amazon for £16.48 & incl delivery, so the option of fitting any of the above SATA devices is very affordable, eg.
Wintech Converter & Icy Box HDD bay = £33.65
Wintech Converter & Startech CF bay = £36.06
this is about £100 less than a second hand SCSI CF reader!