The BBC micro is one of the few 8-bit computers to support hard discs. I have a number of working hard disc units, as well as other "mass-storage" devices and host adapter and controller boards. Please click on the picture links below to learn more:

Akhter Host Adapter	Syquest Drive	Acorn Winchester Disc	Technomatic Winchester Disc
Double Winchester Disc	Xebec Winchester Controller	Acorn Winchester Disc 130	Digital Services Digistore