WD new HARD DRIVES not able to use as BACKUP

I have used WD for years on platforms other than Windows 10.
I bought a new hard drive - and although the wdbackup looked different it did work properly for a month.
Now it wont load at all. I tried reinstalling and now it recognizes my drive is connected but not that it can be used to backup my computer c and d drives.
io don’t know how to solve this…as I need to keep a current backup.

HI, I have the same problem with windows 7 - my new WD worked for about 2 months and now wont backup at all. The computer recognises the WD portable hard drive but just wont back up. I’ve also lodged a help request. It seems to be a popular problem but havent found a solution on the internet that works.