If you have access to the wallet.dat file or the private keys you can export them to other wallets like Electrum.
You could go to the Bitcoin core console and type dumpprivkey "yourbitcoinaddress" and export the same on an SPV client like Electrum to access your funds quickly. Meanwhile you can let your Bitcoin core Sync till it downloads the [Suspicious link removed]pletely.
Hello, i did what you said, copied the private address and tried importing it into Electrum client, but an error always comes up "the following inputs could not be imported:"
edit: Nvm it worked after i shut down the bitcoin core client. Thanks a ton guys, what a helpful community.