I just got an email that I need to buy more service credits for AGOL, but would like to know how I can find out how much space I'm using at any given moment (because storage takes service credits). I haven't seen anything that tells me how much space I'm currently using under My Content, or My Account, or anywhere else that would make sense to me. Also, I'm negative on credits right now and I will be continued to be deducted 4 credits per day...what will happen say if my credits keep going in negative?
Go to MY ORGANIZATION > VIEW STATUS
You can then see your usage, quantity and frequency plus other detail. Includes in the top right how much you have left.