All media (Audio, Photos, Signatures, and Video files) stored in your Fulcrum account contribute towards your allotted storage quotas. The amount of media storage available is based on your plan level. You can see how much media storage you are currently consuming in the billing tab on the setting page of the Fulcrum web app.
Essential - 20 GB
Professional - 100 GB
Enterprise - 1000 GB
Note: You can also increase your allotted storage by adding additional storage blocks as needed.