android - How do I check the type of sdcard's filesystem?

Question

How to check the type of sdcard's filesystem?

For example, in Windows we can see NTFS, FAT32, exFAT, etc.

Thanks in advance.

Answer 1

One solution is to run the mount command then do some string processing on the result:

    try{
        Process mount = Runtime.getRuntime().exec("mount");
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(mount.getInputStream()));
        mount.waitFor();

        String extPath = Environment.getExternalStorageDirectory().getAbsolutePath();
        String line;
        while ((line = bufferedReader.readLine()) != null)
        {
            String[] split = line.split("\s+");
            for(int i = 0; i < split.length - 1; i++)
            {
                if(split[i].contentEquals(extPath) ||
                    split[i].contains("sdcard") ||
                    split[i].contains("_sd") ||
                    split[i].contains("extSd") ||
                    split[i].contains("_SD"))   // Add wildcards to match against here
                {
                    String strMount = split[i];
                    String strFileSystem = split[i+1];

                    // Add to a list/array of mount points and file systems here...
                    Log.i("SDCard", "mount point: "+ strMount + " file system: " + strFileSystem);
                }
            }
        }           
    }catch(IOException e){
        e.printStackTrace();            
    }catch(InterruptedException e){
        e.printStackTrace();            
    }

Running this on my G Pro gave me the following results:

mount point: /mnt/media_rw/external_SD file system: vfat
mount point: /storage/external_SD file system: fuse

Some common Android file system types:

• yaffs/yaffs2 - Yet Another Flash File System
• ext4 - Extended File System version 4
• fuse - File System in User Space
• tmpfs - Temporary File System
• vfat - FAT file system extension