Using Salesforce Files for PSA expenses enables you to upload receipts and other documents to expenses as Salesforce files from the following pages on the desktop version of PSA:
- Multiple Expense Entry UI
- Combine Attachments
For more information on Salesforce Files, see "Salesforce Files" in the Salesforce Help.
To enable this feature:
- From the feature list, click PSA Expenses - Salesforce Files Support.
- In the Feature section, move the Status slider to
(on). The Messages panel displays a summary of the changes.
If you need to make the feature unavailable, move the slider to 
(off).