With the new updates I am unable to move items from my gallery to ##SecureFolder in my Galaxy S21 5G. It happened after the latest update. Earlier update stopped#WhatsApp being unable to download contents from Dual App, #Samsung pointed the finger at third party, now with Secure Folder. I am not too sure who to turn to now, I hope Samsung doesn't keep on saying us to use the phone without applications after spending some dollars on their phone, or ask us to reset the phone for something that happens to multiple user
I have just faced this problem and I have just found an indirect way to do it.
I created a folder and moved all items to this folder then I moved the whole folder to secure folder
Having this issue as well on a brand new a52s.
Extremely disapointed with this samsung phone, I think I'm going to send it back. Gross bugs and overall lack of customisation and user freedom.
Create a new folder in the gallery, then pass all the pictures you want to secure there, and then from that new album, pass them to the secure folder. Make sure you send to sf one by one. It will work!
In my case, this happened when i try to moving files i've downloaded from whatsapp. The solution is so simple. Open your galery, make new album, move your files that you want to secure into that album, and then once again move those files to your secure folder. Voila, it works for me 🙂