Are my pictures stored on Twilio? How much can I store?
Yes, pictures that are sent or received with Twilio long codes and shortcodes are stored in your account. Twilio will create a Media Instance Resource and store the Media content that is sent in picture messages.
Twilio will keep that media around until you issue an HTTP DELETE to Twilio. For more information on the Media Instance resource please see our Media API Docs.
Twilio bills for storage on a monthly basis. The first 5GB/month is stored free of charge, additional storage is charged at 20¢/GB.