There is a Salesforce limit of 5MB for a single static resource and 250 MB for static resources in total. Remedyforce has a set of files, more could be added in future releases, and customers may add some of their own. Once you have reached this limit, you will receive deployment errors during org upgrades like this:
‘Your company currently has exceeded its data storage limits including an extra overflow buffer. Per our terms and conditions, we cannot permit additional data creation within our system until your company first reduces its current data storage. Please contact your company's salesforce.com administrator to resolve this. We apologize for any inconvenience this may cause.’
Remedyforce R&D had deprecated some of these static resources files in Winter 19 which can help save some space, for existing customers, these won’t be removed automatically; customers will need to remove them manually.
If you are facing static resource errors or simply want to clean-up.
To delete the deprecated Remedyforce resources, perform the following steps:
Go to Setup.
In the Search box, type Static Resources.
Click Static Resources.
Delete the following deprecated resources:
In addition to these, customers can delete their own custom resource files if they are not using them anymore.