Anyway to export multiple files to external apps?

I’m currently using the Wireless pro model and would like to import multiple files from SD cards to my iPad. I imported photo and video files to the drive and would like to export multiple of them to, for example, LumaFusion or AffinityPhoto. In the My Cloud app I can only do it one file at a time, which is not an ideal way when I have 300+ files or when I need to work with the video files because it is laggy when previewing them directly from LumaFusion.

Any technical solution or work flow suggestion is appreciate.

Did you try with long press and hold to get multiple selection option in My Cloud mobile app?

Yes, but there is no export option. The export button on the top right only export the currently show file.