I cannot store many altcoins with trezor or ledger nano s.what is the solution to store coins for long term that are not supported to trezor or ledger?
You can download the purses of all coins that are not supported in Tresor and Ledger nano S on the USB flash drive. Then transfer this information to a computer that has never connected to the Internet and will never be connected to it. Create offline transactions there and transfer them via a USB flash drive to a computer that is connected to the Internet.