Hard drive takes up more space?

I've bought an external SSD hard drive to which I have now dragged my games. It struck me that the games that I dragged onto the hard drive required 112 GB of storage space on the laptop itself. Strangely enough, they require 226 GB of storage space on the SSD hard drive. Does anyone here know what might be the cause?

Seems that you have copied twice.

Actually, this can only be due to additional data that you accidentally have on the SSD or accidentally installed with it. The size of a game does not change due to the type of hard drive.

I already thought about it, but even if I don't install the whole thing via Steam, but e.g. If you move a folder with the size of 100GB to the hard drive, instead of 800GB (which should actually still be free) only 650 GB are free.

I have now noticed that the actual size of the external Steam folder is 160 GB, but the size on the disk is 217 GB. What exactly does that mean if the folder on a data carrier is larger than it actually is? (Please excuse the stupid language.)

Maybe you have a compressed hard drive

There would of course be a logical explanation, only 931 GB were available from the beginning, if the hard drive had been compressed, I wouldn't have had so many GB available from the beginning. Or is it?

Since yesterday I have dealt with the subject in more detail and found that every file that is saved on the external hard drive is saved with so-called clusters. Since I use Steam for my games and these are installed via the Steam Library path / folder on the external hard drive, I of course have a lot of files that are occupied by clusters and therefore unfortunately use up a lot of storage space. I guess you can't bypass these clusters without further ado?!