All SanDisk USB Flash Drives

[PeterMac]

I have problem with Sandisk Extreme 64GB USB 3.0 Pendrive, I formated it in Windows 7 to exFAT (full format) and now write speeds are slower than before.

How can I reformat it exaclty same like it was by Sandisk ?

[PeterMac]

I find that information

drive you lose the custom logical block offset which was put in to provide (sometimes radically) improved transfer speeds.

So I need to restore the original file system scheme. Help Sandisk please.

[Ed_P]

"I formated it in Windows 7 to exFAT (full format)"

Why did you format it?  Why not leave it the way it was?

[PeterMac]

Because by default was FAT32, and I need exFAT for larger one file size over 4GB.

[PeterMac]

From CrystalDiskMark Sequential speedsOut of box

Read: 203MB/s

Write: 181MB/s

After format in system

Read: 201MB/s

Write: 159MB/s 

I want to get back to previous speeds PLEASE, even with FAT32 file system, I know it's not very big difference now but it's slower and I feel that.

[Ed_P]

Try NTFS.  it doesn't have the 4GB file limit either.

[PeterMac]

Nothing help, still slower in write!

BEFORE any format out of box

AFTER format

[Ed_P]

Thank you for confirming what I have always said.  Don't reformat a new drive unless you absolutely positively have to, large file sizes being the only example IMO.  I think you've gone as far as you can at this point.  If you need 4GB files to fit you have exFAT and NTFS as your options but there is a down side.

You could try enabling the drive caching capability but you have to be very very certain you always Safely Remove any flash drive you use in the machine.

[PeterMac]

Could You tell me how to get back to previous speeds ?

[Ed_P]

See if SanDisk will replace the drive.  But you will be back at FAT32 and limited to files 4GB or less.