Hi welcome to our forum.
It’s been a long time. Edit mode is the answer. Look at the coloured button prompts. Press red select the Photo tab. If you select Edit mode and select all the files you want to copy. Now switch to the USB drive and copy/move should be enabled.
You may have to play around a bit as it’s been years since I have done this and have no photos on my Foxsat to try it out.
Installing the custom firmware makes this much simpler as you can use it’s Samba or ftp server to copy these directly to a networked PC.
told you it has been a while (2011)
See post 4
https://myhumax.org/forum/topic/copy-files