how to re install personal storage

Rajugurung wrote:

some how i ejected my personal storage from mac book pro.

how can i re install it without loosing any of my data?

What does that mean "ejected my personal storage?"

How to use Time Machine to back up or restore your Mac - Apple Support

If you ejected an external hard drive or USB drive from the Mac, just unplug it, and plug it in again to the Mac.

If you did something else, please explain exactly what is was, where you clicked and what exactly happened after you did that.