I'll stick to the non-controversial general rules for minimizing degradation. Keep in mind some peptides are fine at room temp for months, others degrade practically by the hour, at room temp. Peptides are a category as broad as "food".
1. Darker the better.
2. Colder the better (however, freeze thaw cycles are damaging and must be avoided. Even one will "cost" something). .
3. A cryofreezer that gets to at least -80c is ideal, as good as it gets.
Don't even think about using a "frost free" freezer, which most residential units are, They cycle cold and warm temps to keep ice from building up. Some chest freezers are manual defrost.
If you can swing it, a $800-$1,000 mini-cryofreezer, the size of portable cooler, is a good investment for long term peptide storage, bringing degradation as close to zero as possible for many years. The gold standard. They were $6,000+ until recently..
Personally I keep them in the lowest part of the refrigerator, towards the back, in a lightproof box. At least until my cryofreezer arrives.