I received a box of retrocomputing documentation from nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqpmcd96afrutytx454x2mgz42ndcsuvfch8h5zmqaf9cafg5klenq2q9mrz, only some of which is already u...
A detailed spec sheet for the Hitachi 3-Inch Compact Floppy Disk Drives HFD305SX and HFD305D for Amstrad CPC128 and CPC6128:
https://archive.org/details/hitachi-3-inch-compact-floppy-disk-drives-hfd-305-sx-hfd-305-d/Hitachi%203-inch%20Compact%20Floppy%20Disk%20Drives%20HFD305SX%20HFD305D.pdf
https://archive.org/details/hitachi-3-inch-compact-floppy-disk-drives-hfd-305-sx-hfd-305-d/Hitachi%203-inch%20Compact%20Floppy%20Disk%20Drives%20HFD305SX%20HFD305D.pdf