Each volume has it's own hidden protected OS $Recycle.bin
file that stores deleted items from only that volume. One volume cannot have it's $Recycle.bin
file on a different volume. It must be on itself.
When you open the Recycle Bin, it lets you see all the deleted items from the $Recycle.bin
files from each volume there much like a library does with included folders.
If you like, you can change the storage size of the recycle bin for each volume to fit your needs if free space is available to do so. Recycle Bin storage size
Hope this helps,