When images or files are uploaded via PPOM fields on the product page, these are saved inside the following location initially
[main image] => wp-content/ppom_files/{unique_filename}
and
[thumb image] = > wp-content/ppom_files/thumbs/{unique_filename}
Note: filename is changed due to override issues
And when an order is placed the file is moved inside following location
wp-content/ppom_files/confirmed/{order_no}/{unique_filename}
for example if order no is 889 then it will be saved like:
wp-content/ppom_files/confirmed/889/{unique_filename}
And for the abandoned carts (orders not checkout), the uploaded files/images will be deleted after an interval like a weekly, daily, or monthly set from PPOM settings.