The first 70 Gb's took almost 4 hrs. ?
Holly smoke! what kind of NAS do you have? That is slow fro today
Anyway, the answer is yes. Take the HDD out and connect direct to your system
Use 3rd party utility to read ext/ufs file system.
Make sure there is data alter in NAS's HDD
You can use READ only bridge board
to ensure HDD's data is protected