Back in April 2019, Microsoft introduced a tiered storage architecture. This tiered storage architecture allows Microsoft to use the most appropriate storage type for different types of data used in Dynamics 365 and Dataverse. Last month, Microsoft started moving the storage contents of the e-mail body (email.description) from more expensive Dataverse Database storage to cheaper Dataverse File Storage - for the official documentation check out Dataverse - Email activity tables -Email storage.
Based on the list prices I see in my personal tenant (see screenshot below) - this cuts the unit cost for additional capacity required for e-mails down from 37,4 €/GB/month to 1,87€/GB/month (Quite interesting how they still use the older name Common Data Service :-) )
Your pricing might defer based on the type of licensing agreement that you have. If you had to buy additional storage capacity in the past, you might want to revise your storage usage and the required storage capacity add-ons.
You can check out the storage capacity in the Power Platform Admin Center - I added an example from a specific instance were Dataverse storage for e-mails (see ActivityPointerBase table) from 63 GB to 30GB.
A the same time, we saw a new storage file type appearing called Email which grew to 3,8 GB. This is a lot less than the storage saved in the database since the data in file storage (Azure Blob Storage behind the scenes) is actually compressed.
All in all, a great job from Microsoft which might save you a lot of money. Don't hesitate to add a comments sharing your experience with this....
