[Simon]

Hi Mike,

I just sent the screenshot.

In the meantime I found a workaround.
I have installed Dropbox also on my Samsung Tab S 10.5

This is the way to do it:
(1) go to Dropbox on the tablet
(2) select the file you want to import to MS and keep your finger on the file while selecting (a pop-up menu appears)
(3) choose the "Open with" option
(4) select "Import to MobileSheets"
Done.

I only used a pdf-file here, but maybe it works with onther files too.

Simon