If you haven’t already done so, I would suggest that you try to obtain explicit confirmation that the Uniti Star can utilize a 4 TB or 8 TB drive.
I looked at the writeups on it at the Naim site, and while in the support section there is a Q&A on that point the "answer" is a non-answer:
What is the maximum size HDD/ flash drive that can be used with the Uniti Star?
1.Only USB sticks and BUS powered USB HDDs can be used — The larger the size the slower the performance if more music is stored on it.
Also, it is stated that up to 20,000 tracks can be stored on a local USB connected storage device. 20,000 tracks in Redbook format, averaging say 3 minutes each, total well under 1 TB.
Finally, I’m not sure why the quoted "answer" says "Only USB sticks and BUS powered USB HDDs can be used," which if stated accurately would appear to rule out the use of self-powered external drives. Although from a technical standpoint I can’t conceive of a reason why that might be.
Good luck. Regards,