I picked up a 128 GB Micro SD class 10 speed class 1 (PNY) and put it in the phone. I formatted it and migrated the data and apps that would move to the SD card. Then the fun began! Half of the apps would crash or not open and the ones that would took a very long time to open. After playing with it for a day I reformatted to portable and moved everything back to internal. I understand that some apps and not permitted to move to the card. Even apps that gave permission were a mess. Password Keeper, Instagram, Fox News and others were unusable. As soon as I would move the individual app back to internal it would work perfectly. My Fly Delta app would work from the card but would take about 45 seconds to open and another 30 to load the info. The card that I bought met the specs on the Motorola Web site for speed etc. Anyone using Adoptable storage without problems?