I have recently switched to CM 13 and I am really enjoying Marshmallow for now.
One of Marshmallow main's feature is that it gives the user the possibility to format his external SD card to be used as internal memory by the phone.
I have a 64Gb SD card, and a phone with 16Gb internal storage. Increasing the storage by merging my SD card could be great, however, I would loose the external access to my SD card, which I don't want.
So here's my question : would it be possible to partition my SD card, and only use one partition as internal memory, and keep the other one free to be used with any other device
Here's a picture summing up what would be the result of such a thing:
I thank in advance people who will answer my question