Smartphone on Android stopped mounting a USB flash drive?

Question

Android

Good day.
Today I decided to create two additional partitions on a flash drive, for this I reduced the FAT32 partition, created two new ones and formatted them in EXT3. When viewing a flash drive through a PC, everything is fine, in the recovery menu of the smartphone, too, all files and directories are in place, but the flash drive is no longer mounted in the smartphone system.
Tell me how to fix the situation? I must say right away that the option of reformatting the card does not suit.

Answer 1

It turned out that the program that works with partitions remade them so that only the smartphone system stopped mounting them, after all the transformations it was necessary to additionally format the FAT32 partition via CWM recovery

Answer 2

Try ext4 as a file system, I often heard from friends that the dog is buried in this.