Safest solution is the above, enable pruning if don't have the space and let it sync.
The alternative is to export the address' private key and import it to Electrum, then you can spend it from there.
To export the key, you need to enter commands in the console (
'Window->Console' to open).
Shutdown all wireless connections, or use a dedicated air-gap machine to export/import your key(s).
1. Decrypt the wallet for 60seconds:
walletpassphrase "your_passphrase" 60
2. Export the address' private key:
dumpprivkey "your_address"
Then copy the WIF private key (
starts with 'K', 'L' or '5') offline, preferably on a "
physical" paper. (
do not share it)
3. Download and verify Electrum, download link:
electrum.org | Signature verification guideDuring wallet creation, select the option "
Import Bitcoin addresses or private keys", paste your private key(s) to the text box, then finish creating the wallet with a strong password.
If you're using an Air Gap machine, transfer the wallet file from Electrum's data directory - wallets folder (
loc) to Electrum installed on an online machine.
Wait for a few minutes for the balance to update