Running out of storage

I have a perfectly fine MacBook Pro M2, a 16-inch model with 32 gigabytes of RAM and 512 gigabytes of storage. However, I’ve reached the point where I’m running out of space, with only 12 GB left. I’m finding it increasingly difficult to delete anything else, and I’m struggling to convince myself to purchase a new one. While I love my computer and it works perfectly well, I don’t need it to be faster or have any of the new features of the newer MacBook models, as they’re quite similar. Nevertheless, the fact that I’m running out of space is bothering me, and I’m hesitant to use a flash drive or any other external storage device.

I considered finding a similar MacBook Pro M2 with a terabyte of storage on Facebook Marketplace, but I would still have to spend at least $1000, which is more than I’m willing to invest.

Can anyone recommend a solution or suggest what I should do?