Hi, i am looking at purchasing the product.
when customer upload their file (image),
1. where will it be stored? will i have access to the file to use?
2. can i set a resolution 720x720 minimum file size?
3. can it have capacity option with price variation like the link attached?
1) Depending on your settings either on your server, or translated to a string format in the database. You can directly access uploaded images on the server via ftp or export any images that the product consists off or that were uploaded onto it via the order viewer.
2)Yes you can do that via the default element options.
3) That can be done with WooCommerce, yes.