Filesystem: it's possible ext4 on sd-card?

Using /e/OS
5

No! File formats such as ext4 or ntfs oe exFat are not supported.

Used microSD cards are displayed as “corrupt” or “Unsupported SD Card” (Pic #1 +#9)

An example (with a e-0.7-pie phone):

  1. ext4 micrsoSD card inserted in running device: Error message: “corrupt”

  2. ext4 micrsoSD card inserted and device restarted: Error message : " Issue with SD card.

  3. Tab to fix => "How will you use this SD card? Click to “Phone storage” => Format this SD card? => Formating SD Card. Three directories are created: Apps, System, Cached data

ext4_1v3

ext4_2v3

ext4_3v3

If the /e/ phone has formatted the microSD card as portable storage, the data on it can also be read by other computer systems.