my hard drive not showing up in lsblk pls pls help

[mserver]

i dont know if im posting in the right place or not but
first i have a hdd 20 tb drvie
i Reformatting by accident and i panic and shutdown my machine
and now the drive is not showing up on lsblk or anything else

tell me that i can repair it somehow (i will like my data but i dont think i can do that and that is ok)
pls help me first then you ask me what happened

thank you

 

[mserver]

it is back