Question SSD not there

Feb 23, 2019
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recently had an issue with my hdd which i got replaced with another. i give it to a friend to sort out and they managed to get my pc working gain and boot it from my new hdd, only issue is my ssd now states it is only 1gb when it is 256gb and i cannot erase data on it as it only thinks it is 1gb and no more. all i want to do is reset my ssd back to factory and erase everything on it so i can boot my pc from it and make it that little bit faster. i have tried loads of things but nothing seems to work. please any help would be greatly appreciated.

my hdd is a toshiba p300 3tb 7200rpm 3.5 hdd and my ssd is intel m.2 PCIe NVMe 256gb ssd ssdpekkf256g7h.
 
Feb 23, 2019
7
0
10
oh and also i had all my game saves and my os on that ssd which is now not showing up but i'm not bothered about that all i want is my os on it so it can boot quicker and that its actually put to use in my pc rather than just literally doing nothing.