Hmm. The day before yesterday bought 1TB screw — 2200. The chance that a backup prochitaete in a year, if the screw will be on the shelf in a cool dry place — 100%. At the same time I bought 100 discs (Verbatim, there is some, but not 100% chance to read in six months or a year) — 1200.
While working with the screws much easier: stuck in a USB docking station, I pressed the Power button.