Hi Daniel,  I was not aware there were different versions of the same H310 adapter. It seems the H310 pn HV52W I purchased cannot be upgraded to the firmware from my T420 support site.  Thank you for educating me.
Hello, I have a T420 server with a PERC H310 adapter on 20.10.2-0002 firmware. The Dell support page for my server shows the latest firmware as 20.13.3-0001. I cannot update the firmware no matter what I try. My server BIOS is at the latest which is 2.6.0. Here's what I have tried so far.  1) Lifecycle controller - The H310 adapter shows in inventory but does not show in the firmware update section. I have tried to use the Windows firmware files on a USB but the files are not recognized.  2) I downloaded all the Windows update packages but when I try to execute the program it says it's not compatible with my 64bit OS which is Windows 2012 R2. I have two H310 adapters with the exact same firmware. I have installed them separately and they behave the same. Neither will update to the latest firmware.  When I login to iDRAC Enterprise and click on Storage>Controllers I get a RAC0503 error.  I need to get this server deployed. Any suggestions?   Thank you!    
Cannot update PERC H310 Firmware