Re: want to move apps to sd card in motorola droid razr m
An app that can't run from the SD card, written by a good developer, will have that option disabled - so he doesn't have to answer complaints that the app doesn't work now that it was moved to the SD card. He knows that. Not all apps will run from the SD card. (No widget will, for example.)
An app that can't run from the SD card, written by a not so good developer, will have the option still enabled, but the app won't run after it's moved. (It has to do with the code in the app, and what device the card is mounted as - since KitKat, the internal card is sd0 and the external card is sd1. Before that there was no "internal sd card" and the external card was mounted as sd0. Some apps just can't be written to run from sd1.)
About all you can do to increase your storage is to root the phone, then run an app like
External 2 Internal SD (Root), so your external card is mounted as the internal "card" and internal storage is mounted as the external card. (If you understand how Linux works, you can just change the mounting file by hand - if the phone is rooted.)