How can you access the documents on your notebook with your smartphone or tablet without using a cable? Who knows that?
Bluetooth or save to a cloud storage
Which cloud storage is suitable for this (I just don't like anything from Microsoft)?
You can upload the files to a cloud. For example, I use "mega".
Access notebook folders shared on the network via WLAN.
Transfer the data via Bluetooth.
Store the data in a cloud storage.
Well there are many free ones like Dropbox, Google Cloud etc
With some routers, you can also create a network storage there and store things there. For example with a Fritzbox
Google Drive.