D: Drive missing

[Fatherboard231]

My D drive is missing. I mean, gone from my File Explorer. I checked Disk Management. Gone. I used partition software. Nothing. Other people have posted a similar issue, but I am talking about the D drive absolutely vanishing as if it never existed.

Recently, I have performed maintenance on my computer. The drive is still there physically, but the computer itself is not detecting its presence for some reason. My hunch is that it dislodged in the process of maintenance, but it really looked like it was firmly affixed into the space. I have months of work saved on that drive and I would lose hundreds of GB of storage since my C: drive was getting full.

If anyone can explain this, it would wholly be appreciated.

Thanks.

[Prométhée]

hi

"Recently, I have performed maintenance on my computer"

Before the problem, after?
What did you do exactly?
turn off the computer, unplug the power supply, unplug all peripherals
hold down the power button for a while
Open the computer, unplug the hard drive
connect keyboard mouse screen
After complete startup turn off the , then start again, and reconnect the hard drive
if nothing at the next start, it may be faulty
If possible remove the , buy a usb hard drive adapter
if it is not detected in usb, then it will have to be replaced