Never seen this blowup GB in any other CRM database. This is for standard Case, Customer, Contract, Email (attachments not included).
Extending with 10GB have a very high cost compared to any other system I have seen, even after heavy discount.
I get this feeling that SalesForce is overcharging by calculating a higher database size, than what is actually used (including temp space?). Or is it any other explanations?
1Gb of CSV would certainly take up more space when uploaded to their database: the schema is very complex and supports many features that you probably not fully aware at the moment.
Here's some further info: https://www.siloconnectors.com/blog/understanding-salesforce...
Things like audit logs, and field-specific settings can make a huge impact on overall usage.