SDHC Disk Utility formatting error (Transcend 16gb)

[Username02]

Hi all and apologies if this is posted in the wrong forum.

Perhaps you may help me troubleshoot an issue I am having trying to format a SDHC card on my MBP.

I am trying to create a recovery SDHC disk for my MBP.
The disk is a Transcend 16gb (class 10).

I formatted to Mac OS Extended (Journaled) w/ a GUID Partition Table but after this, Disk Utility is now showing only 10.38 gb of usable space, but finder is showing me the full amount (15.79 gb). When I look in finder there are NO files or folders on the drive.

I tested trying to put more than 10.38 gb worth of files on the disk and was told there was not enough space.

If I format the disk to anything other than Journaled, I get the full 15.79 gb. Has anyone ever experienced this before?

Any way to remove this ~ 5 gb of ghost data on my drive?

My pictures may describe this better. Thanks for any insight:

 

[mulo]

try to format it again, but this time check the option to secure erase it.
worth a shot i'd think.

 

[Username02]

try to format it again, but this time check the option to secure erase it.
worth a shot i'd think.

Thanks for the suggestion and quick reply.

Unfortunately, I have actually attempted this 2 times already with no luck. After the secure erase, it still looks exactly like the screen shot.

Some other things I have attempted which have proved unsuccessful:

- Format on windows to FAT then reformat in Mac as journaled.
- format as non journaled then enable journaling
- rebuild directory with Disk Warrior
- create 2 partitions then delete the second (fat) then try to grow the 1st partition (Mac OS Extended (Journaled)

 

[Username02]

Is there any chance that anyone here owns one of the Transcend 16gb class 10 cards and can do a test format and let me know if it looks like the screen shot?

Thanks