It's time for drivesavers.com
Backup copies are cheaper but let's hope you have some old copy of what you can't lose. And again, externals are too unreliable to keep the last copy on. Make at least 2 or more on 2 or more devices.
I accidentally unplugged my USB hard drive (1TB Western Digital WD Elements ) while I was trying to merge two partitions and some of my important files have disappeared from the folders they once belonged to anyone knows what should I do?