The most outstanding features of this album are: Capacity from 20 Mb to 320 Mb, universal drive, automatic installation, formatting and partition controlled by software and detection of already used addresses.
The physical qualities of this hard drive are those that make it robust: the cartridge cannot be pulled under tension, the read/write heads stay and the metal housing that covers it protects from electromagnetism. It is write-protected, can be locked and enter the keyword.