I have done these things ...
1. Transfer multiple photos to secure folder
2. I made a backup copy of my data with smart swich
3. Then I reset my phone to factory
Can I now restore the contents of the secure folder?
@Yasinism: Further to the reply by @Trottsky you can restore your data by opening the Secure Folder > Tap the 3 dots in the top right > Settings > Backup and Restore > Restore > Select the device and content you want to restore > Restore. This action is only possible if you backed up your data from within the Secure Folder settings themselves.