HDD 3TB
https://www.lan-shop.cz/western-digital-wd-wd30efrx-wd-red-149521

HDD 4TB
https://www.lan-shop.cz/western-digital-wd-wd40efrx-wd-red-163812

HDD 6TB
https://www.lan-shop.cz/western-digital-wd-wd60efrx-red-175265

NAS WD
https://www.lan-shop.cz/western-digital-wd-wdbvbz0000nch-eesn-my-cloud-ex2-ultra-199812

NAS Synology
https://www.lan-shop.cz/synology-ds218-diskstation-ds218-237007