When a game saves, often there are two places they’re stored. One is locally on your computer (so that you can play offline), and another in the cloud (such as Steam cloud, so that they are permanently backed up and synced between systems). There are a few reasons you might want to know the location of your save files.
Firstly, back-ups are important. In the event that your save becomes corrupt (whether due to a bug, modding issue etc), you likely won’t be able to play that save again, meaning all that progress is lost. By copying and pasting your save folder, you’ll always have a backup you can revert too. It’s always recommended to back-up your save before making any changes to your game.
Another reason you might need to know where your save game is located is so that you can actually modify it. Some games have special software available which allow you to open up your save and edit your character freely.
Steam Save Location
GTA V has two different save locations. There are save files which are stored on your computer, and some which are stored in the cloud. It’s also important to note that only your single player saves are stored locally. Online mode saves are stored in the cloud, and can not be edited or viewed.
The default location for GTA V save files on PC is:
C:\Documents\Rockstar Games\GTA V\Profiles\<PROFILE ID>\
There’s a chance that the drive could be different (C:\) depending on where you have installed GTA. The easiest way to get to the Documents folder would be by opening it via the ‘Quick Access’ menu on the left hand side. Just head to the ‘My Documents’ folder, or more specifically: C:\Users\<USER>\Documents
Some of the files in this folder consist of configuration files, save game data and cloud data. These are the files you will need to open in a Save Editor.