Every user has access to its own personnal file folder on RPGM Server. These files can then be selected during instances execution when a file field ask for a file selection.
Access your file space by clicking your name in the top right section and then on My files:
This will open the files dialog:
Clicking on a file will open or download it. The small trash button on the right is for deleting the file. By pressing the Add file button, a drop zone will appear for selecting one or more files from your computer to upload in your personnal folder.