You probably need to do more research on mounting a SCSI drive in a conventional PC and getting the emulator to read it direct as your instructions suggest. I cannot see any way of connecting the Amiga drive to the PC without use of Ethernet or an AmiPC type cable. Maybe there is somethng. Just Google and see what comes up.
For me I have always used ZIP drives for transferring stuff. There really is no need to disk image. Just make sure I copy everything. I tend to LHA the contents in 100MB chunks using DOpus to make sure none of the files get lost in the translation. If I had that problem I would copy the drive to ZIP using a PARNET cable linked to my A1200. I would either then transfer by taking the ZIPS to the PC or use a PCMCIA ethernet cable linked to the PC using Miami and Samba. Once you have a PC copy of the contents you are free to do anything. I even burn an image to CD and read the contents on the emulator. I have many Amigas and all the drives have been copied using Parnet and or ZIP and then burnt to CD. All the computers CD images are in a folder and I can call them out at will.
PS This Amiga 1500 was backed up using 10 floppy disks. Took a while but I did it and now sits on the emulator.
https://www.scuzzscink.com/amiga/scuzzblog_march22/scuzzblogdmarch22_1801.htmGood luck with that. You could also ask on a freindly forum is someone would copy it for you. There may be services that do that. Again just Google.