Electrum 100% safe?
Becareful when you post there's no need to post the same thing just merge them to avoid double posting.Yes electrum is safe afaik and i'm also using their wallet. Always save/make a backup so you won't lose access of your coins.
Thank You, Electrum seems super fast. It doesn't appear to take up that much space on HDD? Is that true?
It is not true, Basically electrum just a desktop wallet that has a little size rather than tries to download Bitcoin Core and use it to be your desktop wallet. Remember you just need to synchronize your electrum wallet to the network and you already able to send or receive your money. It will not take much size of your HDD. It's not as a bitcoin core that makes you try to download the blockchain of bitcoin.
Don't worry about that i've used it.