You would have Steam software to know where yours games are installed... like D:/ instead of C:/ by default

Steam > Parameters > Storage > Add a storage ...

And you would certainly have to get your saved game located in /documernts or %appdata% for your games can work

Yeah but i already have d at deafult but despite having the downloaded at c when i put c at default it wont let me p`lay (btw, what i did to get them from d to c is just copy paste the files)

引用自 oscarwinter：

So til no ive been playing with a laptop that wasnt meant for playing, and just now i got a new pc and for some reason when i insert the external usb hard drive that i have all my games on, the new pc doesnt recognize it or something because eventhough the game ARE in is still wont let me play them and will only let ,me downloading them. Tried to just download them from the external to the internal and still doesnt work. So the issue is pretty much that despite having the games downloaded it doesnt let me play them beacuse it does not recongize them or something and thinks i have to download them

Steam doesn’t automatically recognize games on an external drive unless that drive is added as a Steam Library. Go to Steam → Settings → Storage, add the external drive as a library folder, then click Install on a game and select that drive, Steam will detect the existing files instead of re-downloading. If it still doesn’t detect them, use Verify integrity after starting the install.

Thank anim but like the problem is that i downloaded the from the xternal to the internal, and it doesnt recognoise the internal ones

When you copied them from the external to the internal, where did you put the files? And did you also make sure to copied the files correctly? And completely? Steam depends on a specific file/folder structure, and if it is not followed it won't recognize the game files.

Assuming your Steam client is installed in its default folder...
it is its own default Library folder.

You would see a \steamapps\ folder with a \common\ folder within it. This should be similar to what is on your external. Downloaded game files, in their own specific folder, under \common\ would need to be copied into the the default install Library folder's \common\ folder, AND their corresponding appmanifest_*.acf files from the \steamapps\ folder will need to be copied over as well.

A lot of people mess this up when trying to do copy things over manually. Another important part they often overlook is that the Steam client should not be running while doing this. Make sure to Exit the Steam client by using the menu Steam > Exit, as clicking the X close button just minimizes the client.

edit:
And please...

引用自 oscarwinter：

i downloaded the from the xternal to the internal

...do not refer to copying files from one drive to another as "downloading". Down/Uploading is copying files from/to a remote location. Locally it's simply copying.

引用自 rawWwRrr：

When you copied them from the external to the internal, where did you put the files? And did you also make sure to copied the files correctly? And completely? Steam depends on a specific file/folder structure, and if it is not followed it won't recognize the game files.

Assuming your Steam client is installed in its default folder...

C:\Program Files (x86)\Steam

it is its own default Library folder.

You would see a \steamapps\ folder with a \common\ folder within it. This should be similar to what is on your external. Downloaded game files, in their own specific folder, under \common\ would need to be copied into the the default install Library folder's \common\ folder, AND their corresponding appmanifest_*.acf files from the \steamapps\ folder will need to be copied over as well.

A lot of people mess this up when trying to do copy things over manually. Another important part they often overlook is that the Steam client should not be running while doing this. Make sure to Exit the Steam client by using the menu Steam > Exit, as clicking the X close button just minimizes the client.

edit:
And please...

引用自 oscarwinter：

i downloaded the from the xternal to the internal

...do not refer to copying files from one drive to another as "downloading". Down/Uploading is copying files from/to a remote location. Locally it's simply copying.

I did indeed copy them in steam>steamapps>common, though i dont think i exited the steam client when doing these. Though im not to sure where to find appmaniofest...

引用自 oscarwinter：

...Though im not to sure where to find appmaniofest...

The appmanifest files are one level up so they are in the "steamapps" folder. They all have a file name like:
appmanifest_####.acf
#### is a number that identifies a particular game App.

You need to copy all of them form your external drive to "C:\Program Files (x86)\Steam\steamapps," assuming you installed Steam on your new PC in the default location.