I will show you how to store 20-30 4' grinder disc most simply and effortlessly
Step 1: MATERIALS
Grab an old DVD box
Step 2: Sort Out Your Grinder Discs 4'
sort out your grinding discs (4' size) in the pic i showed 1 rough sand paper disc , 1 smooth sand paper disc, 1 diamond cutting disc, 1 grinding disc, 1 cutting disc.
Step 3: Assemble and You R Done, Its Also Air Tight So No Chance for Rust
Now put the discs as you want the order to be. you can store nearly 20-30 discs in a single DVD box.
Hope this helps.