I was considering a trezor, but I don't see how trezor like devices aren't going to suffer from the same thing as any solid state storage, so I think I will keep saving my stuff on different usb and on different hard drives too and do period backups. It's simply impossible that they all break at the same time and I end up with no bitcoins. Additionally, upping it somewhere with a strong password and changing the file extension seems like a good idea, but im not sure if changing the file extension cam damage a wallet file.
You should read the Trezor
user manual to appreciate exactly how a Trezor works. The 24 word seed that is generated when you initialize your Trezor is the source for all your private and public keys and bitcoin addresses. As long as your seed is stored safely the longevity of the Trezor device is irrelevant. Lose it stompt it to pieces if you like. Then just recover your seed to a new Trezor and back to normal. Most folks who use Trezor keep a spare around for just that. I have Trezors that are two years old and still work fine by the way, but I certainly do not expect them to last indefinitely. The seed in effect is your bitcoin and as long as you have your seed your bitcoin are completely safe.
You can use the same Trezor for both bitcoin and litecoin and Ether support is expected as soon as Mist developers get around to integrating the Trezor API. There are other hardware wallets but I consider Trezor the most versatile.
