Android 9 makes the microSD card unusable
On my Note 4 (Android 6.0.1 Marshmallow) I used to swap in or out a 128gb microSD card, without stopping the Note 4. That card being left in its original exFAT file format, I have on it a number of files of any sort and sizes, including a lot of 1-10gb video files in HD (1280x720) resolution and .flv, .ts, .m2ts o other formats, that are easily explored using ES File manager, and wonderfully played using BS Player or ES Media Player.
On my new phone (Android 9 Pie) I can't anymore. Android 9 refuses to use the card the normal way, and restricts it instead into either "Internal" or "External" storing, each requiring reformatting in FAT32 (file size limit 4GB, incompatible with video files of today) and being probably encrypted (which makers don't tell) in such ways that the 1st is unrecognized in any other device or PC, the 2nd is unable to receive apps.
So the Note 10+ makes a giant step backwards and becomes actually LESS powerful than my CASIO E-11 pocketPC of 1998 or my hp iPaq h2215 Windows Mobile 2003 or any of my Samsung Notes (II, 3, 4). Paying the premium for a stylus etc has gone totally useless. I recommend to drop the Samsung Note line and only buy $95 phones, the premium ones aren't any more worth a premium price.
Versailles, Mon 09 Sep 2019 13:40:15 +0200