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USB Flash Drives

Below procedures will guide you to format your USB flash drive to NTFS in Windows XP:

1. Right-click on my computer and then click manage to open device manager.

2. Open disk drive, right-click on the USB Flash Drive and then click properties.

3. Select policies tab, and then select optimized for performance.

4. Press ok

5. The NTFS option shall be enable in the Windows format windows.

Note 1: About Windows default format tool, please refer to question 6.

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NTFS

FAT

FAT32

exFAT

Supported OS

Windows 2000 (NTFS5) or later

Windows 95 OSR2 or later

Windows 95 OSR2 or later

Windows Vista SP1, Windows CE 6.0 or later

Partition limited

The largest partition is limited to 16EB

The largest partition is limited to 4GB.

The largest partition is limited to 32GB. 2TB (Theory).

The largest partition is limited to 16ZB (Theory).

512TB(Recommended)

Largest size of single file

Maximum file size is 16TB minus 64KB.

Maximum file size is 2 GB.

Maximum file size is 4GB

Maximum file size is 16ZB (Theory). 512TB(Recommended)

Naming Convention

File and directory names can be up to 255 characters long (UTF-16), including any extensions.

8.3 filename(8 characters before dot,3 characters after dot), or 255 UTF-16 characters when using LFN(Long filename)

8.3 filename(8 characters before dot,3 characters after dot), or 255 UTF-16 characters when using LFN(Long filename)

File and directory names can be up to 255 characters long(UTF-16), including any extensions.

Naming Convention

The excludes the following ASCII characters:

?  "  /  \  <  >  *  | :

Suggestion

Suitable for drives or partitions size over 400MB.

Maximum number of files and folders is 65536.

 

In Windows XP, you can format a FAT32 volume up to 32GB only.

In Windows Vista SP1, you can format an exFAT volume more than 32GB but not smaller than

31.2 MB.

In Windows XP,

exFAT not a default supported format, you may update Microsoft service pack (KB955704) to support exFAT file system.

 

Microsoft KB955704 download link: http://support.microsoft.com/kb/955704/en-us/

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All storage product will display a lower than stated memory capacity when they are viewed on a computer. The reason for this discrepancy is the way in which manufacturers calculate a megabyte of memory.

32GB = 32,000,000,000 Bytes , 1024Byte = 1KB
32,000,000,000/1024 = 31,250,000 KB , 1024KB= 1MB
31,250,000/1024
30,517.57 MB , 1024MB= 1GB,
30,517.57 /1024
29.8 GB
Therefore, the capacity of USB flash drive x 0.93
Windows shown capacity.

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Generally, Microsoft windows operating system has 4 kinds of file system formats as NTFS, FAT, FAT32 and exFAT. Each file system format has different limitation for accessing one single file.

There are two following steps to help you analyze your problem:

1.      Please check your file system format first

2.      Please check if your files size fit limitation. If your file system format is FAT32, the limitation of one single file is 4GB; if your file system format is FAT, the limitation of one single file is 2GB.

3.      If your single file size more than 4GB, please formatting your memory card to NTFS or exFAT file systems.

For caparison of above file format, please refer to question 2. If you can’t find NTFS or exFAT option in Windows XP, please refer to question 1 or 8.

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This problem mostly exists when the Flash memory is formatted by FAT format. With FAT format, if you try to copy or paste more that 255 files at one time may receive an error message. When this situation comes up, you can format the USB flash drive with the FAT32 or NTFS format to avoid this problem. If you need to use NTFS format, please refer to question 1.

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Before format, please backup all your data and make sure you select the correct drive. Following steps will show you how to format your USB flash drive:

 

1.  Double-click on my computer.

2.  Right-click on the drive letter associated with your USB flash drive, then select format.

3.  Select a file system type (NTFS / FAT/ FAT32 / exFAT). If you can’t find NTFS or

    exFAT option, please refer to question 1 or 8.

4.  Click start.

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Operating System

exFAT support

Patch download

Windows 7

Supported natively

Windows Vista

Requires update to Service Pack 1 or 2
(both supports exFAT)

Download Service Pack 1

Download Service Pack 2

Windows XP
(Service Pack 2 or 3)

Requires exFAT patch update

Must have Service Pack 2 or 3 installed to use this update
Download exFAT patch update

MAC OS X

MAC does not support or recognize the exFAT file system


 

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Windows XP default support lower than 32GB capacity can be formatted use FAT32 file system format. For 64GB USB flash drive recommended to uses exFAT file system.

The following steps will guide you how to format your 64GB USB flash drive with exFAT file system format:
Notice:

- Please backup all your data before formatting.

- Devices formatted using exFAT can NOT be read by any version of Windows prior to Windows XP.

1.       Download and install the exFAT file system update package from Microsoft, you can also refer to question 7.

2.       After package installation, next steps please refer to question 6 and select exFAT format.

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Before format, please backup all your data and make sure you select the correct drive. The following steps will show you how to use device manager to format.

1.           Right-click on my computer and select manage.

2.           Click on disk management.

3.           Right-click on your correct device, and select format. If you need to format NTFS or exFAT file format, please refer to question 6.

4.           Confirmation dialog will be showed on screen, click yes to continue.

5.           Choose your file format and click ok to continue.

6.           Confirmation dialog will be showed on screen again, click cancel to give up format process, click ok to continue your format process.

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If you use USB extension cable or USB Hub product, please remove your USB storage device from the USB port to make sure your device with enough working power. Following steps will help you update the driver under Vista:

1.       Insert your USB device to your computer rear USB port.

2.       Right-click on my computer, then select manage to enter Device Manager

3.       Right-click your failed issue device, and select properties

4.       Click update driver

5.       Redirect your path to c:\windows\system32 and select all folders.

6.       Make sure your device correctly detected by computer.

7.       If you still have problem with this, please refer to Microsoft Download Center to download the latest Hotfix to fix the problem, or you can contact us.

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Please make sure your device mental of connector be correctly inserted into meddle of plastic. If your computer still can’t detect your device, please reverse the connector and insert it again.

If your computer detects your device, the first time driver installation process will be shown in the right corner of screen. If your computer device autorun function is enabled, the dialog window will show on the screen. Then you can choose which method you want to open your device. You also can use device manager to check your device status.

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The following steps will tell you how to safety remove your USB flash drive:

1.       Find the green arrow icon in the right corner of screen

2.       Right-click on the icon, and select safety remove hardware

3.       Select the USB flash drive you want to remove, mostly it shows with usb mass storage device, then select the usb mass storage after the massage dialog comes out.

4.       Click ok.

5.       Safety remove message will appear immediately in the right corner of screen.

6.       Now can remove your USB flash drive from the USB port.

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It may that another device was assigned with the same drive letter, because drive conflict. If you want to solve this problem, please follow the instructions below to reassign USB Flash drive initial.

1. Click Windows start icon.

2. Select run.

3. Enter diskmgmt.msc and click on the ok to open disk manager.

4. Right-click on USB flash drive, then select change drive letter and paths.

5. Click on the edit.

6. Reassign the drive letter to another one that is not used by another device.

7. Click on the ok to save your settings.

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All computer viruses including stored files will be erased after it had been formatted, but if the computer virus continues to be rewritten to the USB flash drive, we would like to recommend you to scan your computer with a virus scanner or any anti-virus program, once found please remove it immediately.

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1.       We strongly recommend you to connect your USB flash drive to the rear side USB ports on your computer, and please avoid using an USB hub or extension cable.

2.       Please do not use several USB devices at the same time to avoid the possibility of insufficient power supply.

3.       Please make sure you use the safety remove option whenever you would like to disconnect USB Flash drive from your computer. You can refer to question 12 perform safety remove procedure.

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If you receive this kind of message from your computer, please format your USB flash drive at first. Then check your USB Flash drive capacity again. If your problem still exist, please feel free to contact us, we’ll help you to solve it.

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If USB flash drive worked on other computers, but not on yours, then the problem probably within your system.

Below are some recommendations what will help you to solve this kind of problems:

1.       If you had previously installed USB drivers for other devices, please remove them first. Enter your operation system safe mode and remove all unknown devices from device manager, it called universal serial bus controllers, then restart your computer in normal mode and then reconnect the USB flash drive.

2.       Enter your motherboard BIOS setting (please refer to your motherboard manufactory for more information) and follow these procedures:

(a)     Load Optimized Defaults, and select yes

(b)     Choose Integrated Peripherals, and then select USB legacy support to enable

(c)     Press F10 to save changes & exit setup

3.       Enter your operation system and reinstall your motherboard USB drivers.

4.       Update the BIOS for your motherboard.

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Pretec USB flash drive is following the industrial standard to test the transfer rate. Our test is under the standard of simplest condition and general accepted benchmark.
In the case of usual transfer, the speed will be limited by related hardware and software to reach the expected speed. These factors include: 

(a)     Motherboard (Driver, Firmware)

(b)     The number and format of transferring data
Operating System (Version)

(c)     Related hardware ( i.e. USB cable, memory and so on)

All of these factors would be slowing down the transfer speed.

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You can verify if your computer is supporting USB 2.0 or not by following instructions:

1.       Right-click on my computer.

2.       Select device manager

3.       Expand universal serial bus controllers node, and verify if you can find USB 2.0 or enhanced host controller interface in it.

If your computer is not USB 2.0 ready, please according the motherboard user guild to verify your motherboard support USB 2.0 standard or not. In some cases, you will need to install the driver that is packaged with your motherboard driver CD. If you are using Windows operation system, please make sure that you have updated your system with the latest service pack version.

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USB 2.0 devices are backward compatible with USB 1.1 and vice versa. However, when a USB 1.1 device (host or peripheral) is connected, it will only operate at USB 1.1 transfer rate.

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A low-speed rate of 1.5 Mbit/s (~183 KB/s) is defined by USB 1.0. It is very similar to "full-bandwidth" operation except each bit takes 8 times as long to transmit. It is intended primarily to save cost in low-bandwidth human interface devices (HID) such as keyboards, mice, and joysticks.

The full-speed rate of 12 Mbit/s (~1.43 MB/s) is the basic USB data rate defined by USB 1.1. All USB hubs support full-bandwidth.

A high-speed (USB 2.0) rate of 480 Mbit/s (~57 MB/s) was introduced in 2001. All hi-speed devices are capable of falling back to full-bandwidth operation if necessary; they are backward compatible. Connectors are identical.

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