Quote:
Originally Posted by pazos
That's usually the case. Adoptable storage (that's how google calls SD cards that can be "adopted" as internal storage) uses ext4 or f2fs when internally formatted, as the fs needs to support xattr and posix permissions.
When formatted externally vfat is used unless your vendor choosed otherwise, which is not usually the case. That means that you're pegged to 4GB per file limit.
So it ends as a matter of preference. Technically (external) sdcards have some limitations from the pov of what apps can do with them. It is usually cool to use them as MediaStorage (for music, pictures, documents, etc) but they don't provide as many features as when "adopted". They also don't provide encryption, so a person that has physical access to your device and extract the card can steal your info.
OTOH an "adopted" sdcard is useless if you can't login to the main account of your device, so better to have a good backup if you store there some valuable info.
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That is why I prefer to let the micro sd in the slot and have all features with the "adopted" way. Nevertheless my backups should be strong in case of a broken screen or broken power switch (syncthing is here to sync all my folders). This is a good balance between features and security (if stolen).