Alessandro Molina - Why storing files for the web is not as straightforward as you might think. [EuroPython 2015] [21 July 2015] [Bilbao, Euskadi, Spain] DEPOT ( http://depot.readthedocs.org/en/latest/ ) is a file storage framework born from the experience on a project that saved a lot of files on disk, until the day it went online and the customer system engineering team decided to switch to Heroku, which doesn't support storing files on disk. The talk will cover the facets of a feature "saving files" which has always been considered straightforward but that can become complex in the era of cloud deployment and when infrastructure migration happens. After exposing the major drawbacks and issues that big projects might face on short and long terms with file storage the talk will introduce DEPOT and how it tried to solve most of the issues while providing a super-easy-to-use interface for developers. We will see how to use DEPOT to provide attachments on SQLAlchemy or MongoDB and how to handle problems like migration to a different storage backend and long term evolution. Like SQLAlchemy makes possible to switch your storage on the fly without touching code, DEPOT aims at making so possible for files and even use multiple different storages together.