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You can keep copies in multiple devices. Dont store in one device. 1 copy in your personal computer, 1 copy in Pendrive, 1 copy in Micro SD card. Dont connect these things with other devices and internet.
I still don't see how these could still be considered as Paper wallets. Isn't it just like a hardware wallet if done this way?
(though less secure.)
For Paper wallets, creating multiple copies and then laminating those copies should suffice.
That would take care of the wear and tear as well the 'getting wet' hazards.