Salesforce currently allocates 20MB of data storage per user in every EE org. But wait, there's more. Every org starts with a minimum of 1GB of data storage. So whether you are a nonprofit with a grant of 10 free licenses or a small business with 50 licenses, you have a minimum of 1GB for data.
|More than enough is too much.|
If you are using Person Accounts, or if you create a unique Account for each Contact, 250,000 individuals would result in 500,000 records since each individual would require both an Account and Contact record.
Custom objects behave the same as typical standard objects taking 2KB per record, regardless of the number or type of fields associated with those records. Even if you use a lot of rich text fields with large image files, a custom object record still requires only 2KB of data storage. The trick with rich text fields is that they actually are stored as files and so impact file storage rather than data storage.
Consider your storage needs carefully when you create sandboxes. Partial Copy sandboxes currently provide 5GB of data storage, that's more than you have in your production org if you have 50 or fewer users! But they don't offer much in terms of file storage. You may need a Full Copy sandbox for the convenience of copying all of your data at once and accommodating larger amounts of file storage and files from rich text fields.
But for standard data needs, use these basic formulas to calculate your data needs in GB:
( # of records X 2KB ) X 1/1024 X 1/1024
( # of Campaigns X 8KB ) X 1/1024 X 1/1024
( # of Articles X 4KB ) X 1/1024 X 1/1024
In the first formula, we multiply the number of records you have times 2KB, the data storage typically needed for records to get the required number of kilobytes of storage. Then we multiply by 1/1024 to convert from kilobytes to megabytes and again to convert from megabytes to gigabytes.
In the second formula, we multiple the number of Campaign records times 8KB because they consume a lot of storage compared to typical standard and custom objects. Then we do the same calculations to convert from KB to GB as described above.
The third formula is for calculating the storage needs of Articles since their records require 4KB rather than the standard 2KB. Otherwise it works like the first two, with the result expressed in gigabytes.
Keep in mind that Person Accounts and 1x1 Contact to Account data models will create a Contact and an Account record, so every individual is represented by two records rather than just one.
Salesforce offers options for purchasing additional storage space. You can also upgrade to Performance, Unlimited or similar Editions that offer six times as much data storage per user compared to Enterprise Edition (orgs with fewer than 10 licenses may not see the benefits of the additional storage).
But, as Auntie Pat Tern would say, it is good to be grateful for what you have and know when you've got enough for your share. Salesforce makes it easy to calculate your needs.