Unable to save existing file after firmware updates

I saved some file yesterday after the firmware update and it was gone today.
And when I opened the files and try to save, I am unable to save. I needs to rename the files in order to save. Pls enlighten me what is happening after the updates.

Hi @hayden1982 ,

Please refer the article My Cloud OS 5, My Cloud Home: Manage Files on Web and Mobile App: