You can’t open random file extensions on a computer either unless you have an application that understand the format.

Moving files around works just like on Windows and Macs - cut and paste.

And it has the same semantics as Windows and Macs - if I drag a file from one place to another on the same drive - it moves it. If I drag it to another storage location - ie another hard drive on a computer or another storage provider in Files - iCloud, Google Drive, etc it copies it.

It never ceases to amaze me that when computer “experts” criticize people for not wanting to learn how things work - do the same.