Please use spoiler tags if you're going to post a save or request a save with story details.
I've added basic support to GTASnP.com for GTA V saves, based on the few I've made myself.
If a few users could please download this save and let me know if it loads, I would appreciate it: http://gtasnp.com/KDNScI
I would also like some saves from other users to compare with.
We have confirmed that sharing works.
Save File Location and Naming
Save files are located in the folder C:\Users\<Your username>\Documents\Rockstar Games\GTA V\Profiles\<8-character string>\ and begin with SGTA5.
Saves are numbered by their slot number minus 1, up to 16 slot (slot 16 is the autosave slot). So SGTA50000 is slot 1, SGTA50001 is slot 2, etc.
Story missions completed (61.1%) by tigertoddy2008
100% Save by Raxdiam
100% Save File
We finally have one thanks to Raxdiam!
Your online characters and progress are saved to Rockstar's servers, not your computer, and cannot be shared or edited.
Saves from the Xbox 360, Xbox One, Playstation 3, and Playstation 4 versions of the game are not compatible with the PC version.
Also possibly worth mentioning, from the same folder:
PGTA<9-digit number> files are your saved Snapmatic photos. They are 960x536 JPEGs with an extra 292 bytes added the the beginning of the file (header information used by the game and RGSC). They can be converted to normal JPEGs by removing the first 292 bytes with a hex editor and adding .jpg to the file name.
MISREP<4-digit number> are mission replay files. Like save files, their format is specific to the game.
(GTASnP.com doesn't support uploading these. I'm just putting them here for information purposes.)