If you are using Microsoft Defender for Cloud and also have profiles stored on Azure Files you should verify you have the best plan selected. The Microsoft link below contains a log analytics workbook that will show you how much you would potentially save by switching.
Legacy Pricing vs Plan 2 Pricing
The legacy pricing plan (per-transaction) is priced at $0.02 per 10K transactions, which can becomes very expensive when you are storing FSLogix Profiles and have a lot of users in your AVD environment.
There is a new pricing plan (per-storage-account) that is priced at $10 per storage account which includes 73M transactions. Storage Accounts exceeding 73M transactions will be charged $0.1492 per 1M transactions.
You can check if there are any new plans available by opening Azure Portal then going to Microsoft Defender for Cloud > Environmental Settings.
Additional information and workbook is on Microsoft’s Blog.