1. Buy the necessary materials in a stationary Amazon.com: A4 Punched Pocket, 100 Pages/pack Sheet Protector Binder Pocket  Paper File Letter Sheet Protector Binder Sleeves, Clear Sheet Protector  Transparent Document Pocket Folder Wallets Sleeves(Transparent): Home &  Kitchen Bostik White Tack Handy | NTUC FairPriceAdhesive tape - Wikipedia
    1. Ring-Binder Sleeves / Pockets (ca. 10'000 TZS for 100 pcs)
    2. Adhesive putty
    3. Adhesive tape
  2. Fix them to the wall / doors etc. where you will need them - make sure the open end is on top and that you don't block the opening with anything

Now you can easily insert paper and replace it when you need to.