Hi,
While the app already supports viewing photos internally, videos currently require an external app to play. Similarly, adding an internal PDF viewer would minimize the need for external apps, thereby reducing the risk of data leakage. These features would improve the app’s self-sufficiency and make it even more secure for handling sensitive files.
The current Save button resembles an exit or navigation icon, which might be confusing. Replacing it with a more recognizable floppy disk icon or another commonly accepted save symbol would improve user experience and clarity.