What's wrong with the warning that the security checkpoint is not stored or insulated?

What you want to ask is, if the security checkpoint is not stored or kept, how to write a warm reminder? The warm reminder at the security checkpoint reads:

1. Please note that this security checkpoint does not provide storage and storage services. Please take care of your personal belongings.

For your safety and convenience, please take valuables and fragile items with you, and don't give them to others for safekeeping or put them at the security checkpoint.