Question Weird Question About 2.5" Holders

[UniqueUsernamesAreStupid]

I'm looking for ideas to fill empty 2.5" drive holders. My SSDs are in M.2 slots and it seems like a waste of space and an eyesore to have 3 empty spots for 2.5 drives. Are there any other peripherals that fit into 2.5" holders?

 

[box o rocks]

Is the drive cage removable? That would be better than wasting money on devices you don't need and more unnecessary cables (imo).