What device has a limitation that we can only store information to it but can not erase or modify it?

The device you're referring to is a read-only memory (ROM). ROM is a type of non-volatile storage that retains information even when the power is turned off, allowing data to be stored permanently. However, the information stored in ROM is typically written during manufacturing and cannot be easily erased or modified by the user. This makes it suitable for firmware and other essential systems that require stable, unchangeable data.