Usage: The available space in the pricing list refers to what?

Availability space refers to upload space on your forms that use a file upload field. For free accounts this limit is 100MB.

'Upload Space (total):  This limit refers to your forms that use a file upload field. The submissions can have file attachments on them and these files will take up the "Upload Space" limit. Note that this does not reset, this is fixed. If you wish to free up your upload space, you can delete submissions that have file uploads on them, but please do keep in mind that deleting submission data is irreversible and will permanently remove the data in our servers.'

You can learn more from this guide about your account usage and limits: Understanding Your Account Usage and Limits

Check our features and pricing here.

If you need any further assistance, feel free to contact us anytime.