I use cameyo to have a portable version of an application, I need to send some documents file create into portable application by email, but the folder doesn't exist when I find the files to attach to the email.
The folder seems to exist only if I access from the app (for example when I use Open... or save as... by the app)
The files written by the virtualized application are in the sandbox. The default location of the sandbox when run from HDD is %AppData%\VOS. Look for a directory named CHANGES and you should find your files somewhere within. The CHANGES directory you want will be inside a folder with the name of your virtualized application, e.g. %AppData\VOS\Firefox\CHANGES.