Good luck buying the $100’s+ of mounting accessories you’ll need for Lenovo servers. They seriously don’t include any HDD mounting kits nor do they have holes to mount them directly. Then your next issue will be power for more than 1 drive…
The HDD mount kit can be purchased on ebay for about $20.
These really aren’t designed for mass internal storage, they work well for hooking up a JBOD to a raid controller or HBA.