1-st. Version of my M- Pic -Uploader is ready right now (yes it is at moment just an image-uploader —> FILE-UPlOADER is in DEVELOPEMENT). 
Sorry, it is still not perfect, but it demonstrates how to M-upload into the own DATA-MANAGER the direct way, without any usage of 3-rd-party-services (like DROPBOX)…
Here it comes…
In the video you can not see the File-Selection-Process due to security risks.
But here a pic, how it looks like, when picking-up files (in this case → images)…
This was (in the video) hidden M-FILE-SELECTION…
All the rest you can see in the video.
As you can see, the right —> UPLOAD-folder was created in my Data-Manager…
Now i am excited, do we have all the pics inside our new created SUB-FOLDER → TEST, right now ??? Let’s take a look!
Conclusion? —> Did we make a DIRECT-MULTI-UPLOAD ?
Ohhh sorry! I forgot to open the last folder 
Let’s do it!
Oh my god! It works!