I have a question about my TS420 QNAP NAS system that the QNAP forum are so slow to answer and I cannot wait for weeks.
Recently, I have realized some capacity issues and have decided its time to upgrade my storage drives from 2TB to 4TB.
Currently, there are 4 x 2TB (Model # WDC WD20EFRX-68EUZN082.0) inside the NAS and it is configured as a RAID 5 storage array.
My question is, can I remove one HDD at a time using "hot swap" method and slotting in my new 4TB drives? Will the RAID rebuild itself without losing any data or causing any file corruptions?
Thanks in advance.