Do i need an external power to use by usb simpletech 250gb drive, and do i need a software to use it?

Windows 7 does not recognize SimpleTech 250GB external USB drive ...

answers.microsoft.com/...does-not-recognize-simpletech-250gb/f7ceccd0...

Just bought a new computer, running Win 7. Drive worked fine on Win XP. ... Windows 7 does not recognize SimpleTech 250GB external USB drive ... I find it hard to believe that a external USB 2.0 drive can't work with Win 7. There must be ...

SimpleTech dvi hdmi pc Hard Drives Questions & Answers ...

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Question about SimpleDrive 160 GB External USB 2.0 Hard Drive ... Question about250GB USB2.0 7200 RPM External 250 GB IDE Hard Drive ... my PC does not recognize the external drive 96300-40001-001 Driver Problem: Check whether ..

Buy an external USB hub that has an AC power adapter.
Your computer is not providing enough power to spin up the drive.
A self powered hub will provide the necessary power. 7 Port USB 2 0 HUB AC Adapter Monoprice com

Hi, I think I found one for you 5V AC DC power adapter for SIMPLETECH 96200 41001 075 250GB USB hard... . If it is correct, it is OK to just find ANY power cord with Output Voltage: 5 Volts DC and Amperage: 1 Amps. It just need to fit in.

The correct power adapter for the SimpleTech 250GB USB 2.0 7200RPM drive is 12V, 2A tip positive.

Your internal drive is different than your external drive. If you put more files onto your SimpleTech drive, then that one is going to fill up faster. The best thing to do would be to go through your SimpleTech drive and delete anything that you don't need. I don't remember my SimpleTech drive coming with any software on the drive, but if it did, it didn't take up much space.

You need data recovery.

If you are interested this guy operates a remote data recovery service and works off of donations. http://FreeDataRecovery.us

This sounds like your USB bus does not have enough power available to run all devices that are connected to it.
If you are using a USB HUB, this is not unusual.
Try disconnecting other USB devices to see whether that allows the external drive to function properly. If it does, then I suggest that you get a "powered" USB hub to use to connect all of your devices.

Your drive is not getting enough power. try a different usb cable and a different usb port on the computer

You shouldn't need a special driver, but you do need to plug in the usb y cable to 2 usb ports. Normally 1 usb port doesn't supply enough power to make external USB drives go. That is why I prefer firewire, it supplies much more power at higher sustained rates. Once the drive is going just open the Disk Utility and format for your needs. If you need to share files with a PC, partition as MS-DOS (FAT). If you are sharing with a mac or not using the drive on other computers, format as extended with journaling.

Yes, you need a power supply. I have several USB peripherals that, in a similar way, APPEAR to be on when you plug them into USB. But that interface cannot supply enough power to actually run the machine. The maximum is 0.5 A * 5 V = 2.5 W. The wee portable drives can run on that power, but a normal desktop drive, such as is inside a full-size desktop external enclosure, use ~ 8 W.

So you need a DC power supply! I bet SimpleTech can tell you what the correct current, voltage, and polarity is. Good luck.