Files deleted from C drive also deleted from backup

[noodly]

I am trying to make some space on my C drive in Windows 8.1. I had backed up my photos to a second drive on my computer, which is my F drive. I was deleting the photos from my C drive but they simultaneously went into the trash from my F drive as well. I happened to be looking as I wanted to verify what photos I'd already copied.

What is going on here and how do I prevent this? Shouldn't those files be a copy of the originals?

 

[USAFRet]

All depends on how exactly you made this "backup".
So what did you do, precisely?

 

[noodly]

I believe I simply copied the files to another drive.

 

[USAFRet]

I believe I simply copied the files to another drive.

Then what you state can't have happened. A second physical copy is just that.
2 files, on different drives. There is no linkage.

 

[noodly]

Well, it's been a few years so evidently I must have done something else. I do see see my file history on my G drive which is partitioned on that same hard drive. The only other thing I would have done would have been to use Windows software to make a backup.