For the last few months, I've been splitting a bag of coffee beans into 2-3 portions and freezing them. I've seen that it extends the freshness by a bit. Now, I've been storing them in older coffee bags (the standard sealable ones) since they take up less space than jars and also I'm just reusing something that would've gone to landfill/compost.

I do clean them of residues of older beans and don't use a bag more than 2 times since I get new bags whenever I buy beans anyway. Are there any health/quality issues that might arise from this that I should be aware of? Should I just store them in sealed glass jars instead?