Any torrent client has an option to Create New Torrent under File [On top bar @ left] ...
It will prompt where to - Add File for Single / Add Directory for Folder ...
I don't see a way to upload files / folders
Now :
These option is only available, once the small torrent file successfully posted and re-downloaded
It will prompt where to - Point/Locate/Add File for Single / Add Directory Folder in your PC ...
For Single File point it where it has been located ...
For multiple file point in sub-directory folder not the folder you are posting, otherwise it may result in finding peers ...
Anyhow, how come you not know these and you're not aware on the process,
In the past you said you uploaded a ton of torrent and you have some issues ...
because of upload privilege was ??? ... [no comment] 