Data present on an SD card can reveal lots of information that is useful during a forensic investigation. The fact that pictures, videos, voice recordings, and application data are stored on the SD card adds weight to this. As mentioned in the previous chapters, Android devices often use FAT32 or exFAT file systems on their SD card. The main reason for this is that these file systems are widely supported by most operating systems, including Windows, Linux, and macOS X. The maximum file size on a FAT32 formatted drive is around 4 GB. With increasingly high resolution formats now available, this limit is commonly reached, that's why newer devices support exFAT: this file system doesn't have such limitations. Recovering the data deleted from an external SD is pretty easy if it can be mounted as a drive.
If the SD card is removable,...