Why are you using third party tools for this?
An "unreadable" result sounds like a failure from HashCheck - What does your OS Native tools give you?
Ubermidget2
joined 10 months ago
How storage do you need?
Absolutely, copy the source.
Internet Link Rot gets worse every day
Probably identical to a Seagate Exos with a 400% Dell Markup
For what it is worth in the NAS:
20x 6TB HDD - $1,400 ($11.66 per TB)
10 x18TB HDD - $3,500 ($19.44 per TB)
Hopefully deals like these can keep the cost of your NAS down a bit