It can NOT be deduced from the above data sheet that the NAS is not SSD-capable. The data sheet only states that the EX2 Ultra from WD is not delivered with SSD as standard.
A statement on the compatibility of SSD drives can be derived from the compatibility list. According to the user manual, this list is supposed to exist: "A list of compatible drives can be found at.
support.wdc.com" - if you find it, please post it here... WD's service is simply lousy compared to QNAP.
Sincerely

Hello,

I have listed the corresponding data sheet for you. As you have correctly recognised, this device is not SSD-capable and does not have one.
https://documents.westerndigital.com/content...

Many thanks for your contribution and best regards
your team from Galaxus.