I'm trying to migrate away from my Multibit Classic wallet. Recommendations I've read say to setup a new wallet with other software (I'm trying Electrum) and then send the BTC to the new address. I've got about 0.95 BTC.
It's not been easy because the transaction fee in Multibit Classic is set too low, so I've had to get the private key to my wallet into Electrum (either sweep or additional wallet). This has been complicated because Electrum doesn't like the format of the key from Multibit Classic so I've had to find a website to decode it.
I am now in a position to send the BTC, but when I preview the transaction, I see my transaction fee is 0.08BTC - that's around $300! It would seem it's because the transaction size is large, as I collected by BTC through altcoin mining a couple of years ago, so there are lots of source transactions (141) which makes my transaction around 22KB. Would that sound right? See below.
https://preview.ibb.co/iGo145/bitcoin_high_fee.png
Can this be right? I can't believe I'm being charged $300 in transaction fees! Please help!