I am unable to sync with the network because I have too little disk space I downloaded Bîtcoin Core on a laptop without knowing it takes up a lot of space and my laptop has only 128 GB disk space. It keeps saying "low disk space" so it won't sync. I sent lots of bitcoins there a while ago and was wondering if there's a way to retrieve them.
I would suggest running bitcoin core in pruned mode if you don't have enough space to for the entire blockchain. 

You can start bitcoin with the -prune=X command line argument or put prune=X in your conf file, to limit the amount of space used by the blockchain to only X megabytes. It will delete the old blocks and keep only the most recent blocks on your computer.

Related answer: How to free up the space taken by bitcoind?

Alternatively, if you just want to recover your coins, you can backup your wallet file and move it to another computer that has more space for example.