JkDefrag نسخة مجانية من البرنامج الرائع تعمل بشكل الي و سهلة الاستعمال و سريعة و لا تستهلك الرام او المعالج..يعني لن يكون هناك اي بطؤ في الجهاز و يمكن ان يعالج كل من (floppies-usb disks/sticks)
JkDefrag description
A free (released under the GNU General Public License) disk defragment and optimize utility for Windows
JkDefrag is a free (released under the GNU General Public License) disk defragment and optimize utility for Windows
Completely automatic and very easy to use fast low overhead with two optimization strategies and JkDefrag ia able to handle USB disks/sticks and floppies
Included are a Windows version a commandline version (for scheduling by the task scheduler or for use from administrator scripts) a screensaver version a DLL library (for use from programming languages) and versions for 64 bit Windows
JkDefrag is based on the standard defragmentation API by Microsoft a system library that is included in Windows 2000 2003 XP and Vista
All defragmenters are based on this API including commercial defragmenters JkDefrag is therefore very solid and there is no risk of losing data
You can stop the program at any time it will finish the current file in the background
If your disks use NTFS then you're even safe when the computer crashes in the middle of defragging
Nevertheless it's still a good idea to backup before defragmenting just like with other defragmenters because the heavy use of the harddisk may trigger a hardware fault 
