olemus
suuremahuline püsitalletuse vahend
(mehaaniline, optiline, elektromagnetiline, pooljuhipõhine)

Wiktionary:
(computer hardware) any form of persistent data storage technology with high capacity relative to that of the high-speed non-persistent memory of computers of its time

ülevaateid
https://en.wikipedia.org/wiki/Mass_storage

https://en.wikipedia.org/wiki/USB_mass_storage_device_class

http://gauss.ececs.uc.edu/Courses/c4029/code/files/ch12.pdf

http://janaxelson.com/files/usb_mass_storage_chapter_1.pdf