HT1782 My usb pendrive was 16gb , but when i erased it through disk utility , its total space is now showing just 2 gb . What can i do to restore the remaining space

Question

pls help me

Answer 1

There was some max size for fat16.  2gig max seems familiar to me.
Log in disk utility.  It should tell you what the size of the 'drive' is.
The terminal application will give detailed information that you can copy & paste to this thread.
Macintosh-HD -> Applications -> Utilities -> Terminal
mac $ diskutil list
... clipped ...
/dev/disk2
   #:                   type name               size      identifier
   0: FDisk_partition_scheme                    *3.8 GB   disk2
   1:              Apple_HFS Recover            3.8 GB    disk2s1
wait for the  $ then type diskutil list then press enter.
in my case, I have a '4gig' flash drive listed.  3.8gb is close enough to 4.gig.
mac $ df
Filesystem              512-blocks      Used     Avail Capacity  Mounted on
/dev/disk1s16            569927296 135962488 433452808    24%    /
devfs                          225       225         0   100%    /dev
fdesc                            2         2         0   100%    /dev
<volfs>                       1024      1024         0   100%    /.vol
/dev/disk2s1               7913360   5744608   2168752    73%    /Volumes/Recover
... clipped ...
another view of my 4gig flash drive is /dev/disk2s1
Post the results fo diskutil list & df here.  Thanks.
Try disk utility again.  Try formatting again.  Did you create multiple partitions? 
Be sure to partition the correct dirve.  See what disk utility says about the size.
What version of Mac OS are you running?
Robert
Robert