As far as I know, there three types of wallet: desktop wallet, webwallet and external wallet (Trezor and the like). What are the differences between them? Which one is better security-wise?
you can read some more
thread [General] Bitcoin Wallets - Which, what, why? (it seems you've known this in your other thread)or if you prefer wiki style explanations, I posted in another thread awhile ago (quoted below)
if you still have questions or unclear on some info on these reading materials
then ask it here... we are a friendly community for newbies wanting to learn (but not for merit whiners who care only about ranking up for signature campaign)
checkout Bitcoin Wiki for your daily needs 
of bitcoin information
https://en.bitcoin.it/wiki/Paper_wallet
https://en.bitcoin.it/wiki/Hardware_wallet
https://en.bitcoin.it/wiki/Browser-based_wallet
https://en.bitcoin.it/wiki/Wallet
of bitcoin informationhttps://en.bitcoin.it/wiki/Paper_wallet
https://en.bitcoin.it/wiki/Hardware_wallet
https://en.bitcoin.it/wiki/Browser-based_wallet
https://en.bitcoin.it/wiki/Wallet
Wow! Thank you so much. This info is very useful. I've already read the first article and now I'm going to read the other suggested articles.