I have to download to my mobile phone BUT I have to specify an other folder than the one used by default by WD2go.
From this specific folder, I can open, edit, modify (and save) the file on the mobile phone.
After that I have to upload the file to WDMyCloud. WD2go save it on WDMyCloud with a new name “initial name-1” and it does not overwrite the previous version of the file.
Therefore if I don’t want to have several version of the file, I have to delete the previous one from MyCloud. It is my personal choice to change the name in order to always have “initial name”.
I don’t know if it is the same procedure from a PC but I tried this morning with my android tabled (ACER INCONIA TAB) and I did not suffer the same issue: I was able to open directly the file from WDMyCloud through WD2go apps, to modify it and the new version was directly saved on WDMyCloud.
I am convinced now that this is not linked to my wifi connexion.
I hope that these complementary explanations will be helpful…