iag042016,   I researched the drives you inquired about, and from what I see, only #2 is actually showing a supported on the R520 platform.   Hope this helps.  
Hello, being in need of storage amount extension for an PE R520 server, but in doubt of certain hardware pieces compatibility. May I please ask here to clarify whether or not the following devices will be compatible and working together properly? Having PowerEdge R520, BIOS v. 2.7.0, with PERC H710 Mini with 21.3.5-0002 firmware. Will it work with these DELL HDDs: Many thanks in advance!
New HDD selection for an PE R520 server