I cannot open my new SSD in File Manager (Failed to open/Can't mount file)

[Moltke]

Since the OP seems to come from Windows and maybe it's his/her first time using Linux, he/she might be confused with the new terminology, system's structure and whatnot, though they might've googled a bit before installing a Linux distro,  LL in this case, however,  I admit being confused when first tried Linux back in the day too; file system? home? root? what are these? where's my drive? my documents and settings? my programs? It took me a while till I finally started to understand how things works in Linux, at least very basic stuff like this. I just googled using search terms like "managing devices in linux", "managing internal disks in Linux" and similars hoping to find something that explained the OP this, every result pointed to the same thing: file systems, which is ok and accurate, but I don't think it helps new fresh first-time Linux users coming from Windows who also might feel confused and a bit lost when confronting this situation; open thunar or whatever file manager they use and find there's no "\C: drive" nor there is any "my documents and settings" directory which may lead to frustration and finally discourage them from using Linux. The one article I found that deals with this in a easy and clear way a "Windows refugee" can understand is this https://www.guru99.com/linux-differences.html among other things it states the following:

Windows has different drives like C: D: E There are no drives in Linux

And this

In Linux you would find the system and program files in different directories whereas in Windows, system and program files are usually saved in C: drive.

So, there it is. No drives in Linux but files, in your journey using Linux you'll probably find this phrase more often than not: everything is a file in Linux.

Hope this helps!