Thanks to all of you for the reply. I have used 4 different softwares & saved their results in notepad and succeed in wiping everything.
Posting the results here so anyone can get help. Sorry for bad English as i wrote it in a hurry!

I have two drives for operation, 8 GB Card & 16 GB USB.
Have four softwares for data wiping named Macrorit Disk Wiper, Disk Wipe, Lowvel & HDD Low Level Format.
Two data recovery softwares named Recuva & MiniTool PowerData Recovery.
One Hex Viewer Named WinHex.
Wiped 8 GB Using Disk Wipe & Macrorit Data Wiper. Results :
DISK WIPE : (8 GB)
Disk Wipe Showed Nothing On Recovery On Recuva.
In MiniTool PowerData Recovery, It Showed System Volume Information & Other Useless Temp Folder.
WinHex Showed Data Only In Some Sectors In The Last & Only On First Sector
MACRORIT DISK WIPER : (8 GB) - Failed Because Showed "TempFiles" Named Files
Macrorit Data Wiper Showed "TempFiles" Named Files In Recuva.
In MiniTool PowerData Recovery, It Showed System Volume Information & Other Useless Temp Folder.
WinHex Showed Data In Last Sector. Other Sectors Were '0' & Some Sectors Were Written With A 'F'
HDD Low Level Format - (16 GB)
Recuva Showed Nothing.
In MiniTool PowerData Recovery, It Only Showed System Volume Information
WinHex Showed "UNREADABLE SECTOR" In Every Sector & Showed Random Characters In Every Sector
LOWVEL: (8 GB)
Lowvel Showed Nothing In Recuva.
In MiniTool PowerData Recovery, It Showed System Volume Information, Lost Files Folder & Recycle Bin Folder But No Data Has Been Found.
WinHex Showed Data In First Sector. Other Sectors Were '0' & Some Sectors Were Written With A 'F'