To update the Ledger Nano S Firmware 1.4.1, be sure to have your 24 recovery phrase. The reasons for the update are security vulnerabilities, the vulnerabilities are serious but not critical according to Ledger. Another reason you can hold 18 cryptocurrency in the Ledger but in reality probably 10-12 crypto. Depending on your cryptocurrency composition, if the cryptos are clones of bitcoin, such as Bitcoin Cash, Bitcoin Gold, Litecoin, Dogecoin, Dash, Zcash, Komodo, Stratis, Posw, Pivx, Viacoin, Vertcoin, Stealthcoin, Digibyte, Qtum, Hcash. It will take less space. If the cryptos from completely different code base such as Bitcoin, Ethereum, Ripple, NEO, then you may only have 4 or 5 cryptocurrency in the Ledger. If you see unable to update the OS updater and if you remove all the apps before upgrading, then the Ledger server is busy, try some other time.
