We have a requirement to upload before and after pictures, can we use rich text area field ? Which storage category does Rich text area field comes into - data storage or file storage ?
Help docs seem to answer all your questions:
The maximum size of an image that can be uploaded in a rich text area field is 1 MB. Only .gif, .jpg, and .png file types are supported.
Images within the rich text area fields count towards file storage for the object that contains the field.