Not gonna dispute "good transfer speed" for the new entry-level NAS as i do not have any data on that.
But for the probox DAS, im getting typically native hdd speeds (>120 MB/s with WD Red 5400rpm) instead of the ~20-25 MB/s i used to get for entry-level NAS.
Entry-level NAS speed is typically bottlenecked by CPU/RAM and not the interface.
Since a probox is simply a DAS attached to a PC....
well, the PC itself can be server to host stuff too. You can even set up your own Cloud server.
But of course, it's not as simple and convenient as NAS that already comes pre-installed with Cloud services through mobile apps etc.
I find NAS is quite expensive though.
If TS is technically-inclined and wants an NAS, installing FreeNAS on HP ProLiant microserver would probably be the most bang-for-buck solution.
I am aware about the CPU / RAM hence i took this NAS from Synology as Benchmark.
DS218j @ SGD$262
https://www.synology.com/en-global/products/performance#2bay
Speed review here
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Asustor AS1002T NAS @ $169
https://aphnetworks.com/reviews/asustor-as1002t/7
>100MB/s (read/write) too
of course, you can set up on your PC. Just make sure the services will not be affected when you are doing intensive stuffs and also power consumption. Np at all.
I lazy to calculate myself hence here:
https://services.spservices.sg/elect_audit_frameset.asp (estimated)
based on what was given by SP bill, i could buy almost 1 new 1TB HDD every month with the power consumption used with the combo of (das + PC)
Honestly no idea what lousy nas you used previously to give you such a bad impression. NAS manufacturer has changed drastically and could provide good performance (at least on file sharing capability).
It is neither 20MB/s transfer speed nor that expensive to begin with.