Both homemade and store-bought bread https://greenelly.com/ can become moldy over time, and this time can come after 4-5 days. You can protect yourself from this if you follow a few tips and store it correctly.
separate black and white bread into different areas of the bread bin or bags;
regularly treat the bread box and knives with 3% vinegar;
in the refrigerator, bread is less likely to become moldy;
if you are going to be away for a long time and have some bread left, freeze it. This way he will live for more than a month.