Hi Lars Seagren,
Greetings & Welcome to Microsoft Q&A forum! Thanks for posting your query!
The Default maximum storage account capacity is 5 PiB.
To verify your storage account's total capacity limit and check if you are reaching your quota, you can follow these steps:
From the Azure portal, select "Quotas" and then select "Storage."
Choose your subscription from the drop-down menu and use the Region filter to specify the regions you're interested in. This will show your storage account quotas for each region.
References:
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If you have any other questions or are still running into more issues, let me know in the "comments" and I would be happy to help you.