EasyUpload
EasyUpload Server Accepts Images from Android to be Uploaded to a PC
...The project just works for images and later it can work with any type of files.
The source code of both the client and server apps are available in this GitHub page: https://github.com/ahmedfgad/AndroidFlask
The project is documented in a Heartbeat tutorial titled "Uploading images from Android to a Python-based Flask server" available here: https://heartbeat.fritz.ai/uploading-images-from-android-to-a-python-based-flask-server-691e4092a95e
Logo image from flaticon.com by phatplus (https://www.flaticon.com/authors/phatplus)