Meaning of the word "a store is no sore" in English

What does "a store is no sore" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

a store is no sore

US /ə stɔːr ɪz noʊ sɔːr/
UK /ə stɔː ɪz nəʊ sɔː/
"a store is no sore" picture

Idiom

it is better to have a supply of something kept in reserve than to lack it when needed

Example:
I know we have plenty of batteries, but a store is no sore.
She keeps extra blankets in the attic because a store is no sore.