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How do I find out which file system is used by my device's /system, /data and other partitions?

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DiskInfo displays this information (among other things) when you select a partition to view its details. Works with the internal partitions on my Nexus 5, but should also support external SD cards and the like:

screenshot

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    it doesn't tell me what filesystem /sdcard is – endolith Dec 13 '16 at 2:00
  • It says sdcardfs even though the file system actually is exFAT. – root Jan 14 at 23:43
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Alternatively, one can use a Terminal Emulator app which requires no usage of adb.

  1. Download a Terminal Emulator of your choice from Play Store here.
  2. Open that app and issue the command mount. You can also use the command df to ascertain the partitions to be looked in the former output.
  3. An alternative for mount is blkid command which shows a much better output for our need.

Note:- 3. requires ROOT access while the other steps can work without it.

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    df doesn't show me the file system type, only the path in /mnt (not the mount point), two numbers (probably total and used bytes), percentage (probably of used storage) and another path (still not the mount point). – Fabian Röling Jun 10 '19 at 17:46
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You can use 

adb shell mount

to find out which file system is used by all the partitions of your device. You need to have adb installed, of course, for this to work. You can install adb by using (Windows only)Minimal ADB and Fastboot, or you can install full android sdk, if you wish.

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  • Thank you for traveling with... oops :) Yogesh: the linked XDA thread only works for Windows. See our question Is there a minimal installation of ADB? for a more universal solution (supporting Linux and Mac as well). Or minimal_adb_fastboot with support for Mac (plus experimental Linux support). – Izzy♦ Apr 10 '15 at 12:19
  • Adb work also on google chrome in linux distributions like ubuntu, I have installed it and try it and work perfectly, so, my advice for those who know only windows, stop saying anything against linux distributions... – M. Bouzar Aug 18 '18 at 10:43

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