Storage exceeded in middle of synch
You may enable pruned mode on your blockchain storage by setting the following line in your bitcoin.conf

# Reduce storage requirements by only storing most recent N MiB of block. This mode is incompatible with -txindex and -rescan. WARNING: Reverting this setting requires re-downloading the entire blockchain. (default: 0 = disable pruning blocks, 1 = allow manual pruning via RPC, greater than 550 = automatically prune blocks to stay under target size in MiB).
prune=10237

Bitcoin Core will automatically prune the blockchain storage back to the amount specified.

Regardless, always keep a secure up-to-date backup of your wallet.dat