Zoho Office Integrator enables your files to be viewed/edited in Zoho document editors and you have complete control of your data including storage.
The only time your file resides (temporarily) in Zoho Servers is when you upload it for editing. Once you close the browser, we delete the file content from our servers. We also run a schedule every 6 hours to clear documents in cases where user fails to close the session due to a browser crash or network issues.
Also, please check the visual workflow of how open and save documents works in Office Integrator below: