Can a USB 3.0 drive be connected to the 2.0 port? What speed will I get?

Hello. I'm going to buy a 500GB external hard drive with usb 3.0 and I have usb 2.0 in my laptop, does it matter in data transfer this difference in usb?

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The drive will run at the maximum speed for USB 2.0 - USB 3.0 is backward compatible.

backwards compatible - what does it mean ??? that is, I can buy it without worrying that the transfer from disk and to disk will be correct without any surprises ...

http://pl.wikipedia.org/wiki/Kompomatno%C5%9B%C4%87_wsteczna

Added after 3 [minutes]:

kiko1 wrote:

? that is, I can buy it without fear that the transfer from the disk and to the disk will be correct without any surprises ...

Yes, it will only be slower than if both devices had a USB version 3 interface.

I have a very similar question, so let me refresh this thread.

Will there be a problem with current efficiency when connecting a USB 3.0 drive to the USB 2.0 port (USB 3.0 allows you to pull more current)? Do new drives designed for USB 3.0 sometimes have a higher power consumption?

The topic interested me, because I want to buy a new disk for my TV tuner (Ariva 120 combo). The tuner has only one USB 2.0, it works without any problems with the current WD 80GB disk.

musculus wrote:

Do new drives, provided for USB 3.0, sometimes have a higher power consumption?

Assuming they have - the development of technology, however, aims to minimize energy consumption - they will not consume more current and will be okay. But since it is a tuner, it could be different. The neighbor "died" just like that when he plugged in a compatible USB drive.

beo wrote:

musculus wrote:

Do new drives designed for USB 3.0 sometimes have a higher power consumption?

Assuming they have - the development of technology, however, aims to minimize energy consumption - they will not consume more current and will be okay. But since it is a tuner, it could be different. The neighbor "died" just like that when he connected a compatible USB drive.

I am aware that there is a tendency to minimize energy consumption. On the other hand, however, the new drives are faster, so it may be at the cost of more energy consumption - and since the new interface allows for more, I am afraid that manufacturers will not take advantage of it.

Therefore, if someone has experience in connecting new drives to USB 2.0, then maybe he will write if there was a problem with the power supply (or some other)? And I would be grateful if you could provide a drive model (which models are trouble-free, and which can surprise you).

Regarding the tuner resistance - I know that it can be different. But my tuner has been working with the disc for a long time and it's OK, so I guess I can take a chance with the hope that the new disc will not damage it.

I had such a problem with the disk ... but 2.0 I mean with many ports when connecting 2.0 to 2.0 there was no power, you had to use this 'forked' cable and connect it to 2 ports on the computer. With some 2.0 ports and all 3.0 ports, he walked easily on a single cable.

So in the worst case, when it runs out of electricity, you can use a 'forked' cable, connect one (the one sending data) to the tuner, and the other to an additional power supply, e.g. 220V-> USB power supply:
http: //******sieciowa-usb-do-apple-iphone-3-4-5-ipod-i3667661166.html

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Or some usb port on tv or anywhere else.

I'm not a specialist, but I connected it like that, it didn't explode and it even worked

lithax wrote:

I had such a problem with the disk ... but 2.0 I mean with many ports when connecting 2.0 to 2.0 there was no power, you had to use this 'forked' cable and connect it to 2 ports on the computer. With some 2.0 ports and all 3.0 ports, he walked easily on a single cable.

So in the worst case, when it runs out of electricity, you can use a 'forked' cable, connect one (the one sending data) to the tuner, and the other to an additional power supply, e.g. 220V-> USB power supply:
http://allegro.pl/ladowarka-sieciowa-usb-do-apple-iphone-3-4-5-ipod-i3667661166.html
Or some usb port on tv or anywhere else.

I'm not a specialist, but I connected it like that, it didn't explode and it even worked

Yes, this is a solution, but when used with a TV tuner, it has a disadvantage: When the tuner is turned off, there is no power to the USB. On the other hand, there is voltage on the power supply - that is, even after turning off the tuner, the drive is still powered.

This is indeed a disadvantage. At home, I usually connected to the 'service' usb on the TV, so the voltage was only when the TV was turned on.

I already have a drive - WD Elements WDBUZG0010BBK-EESN (1TB, USB 3.0). This disc comes with my TV tuner. In the case of this disk, the manufacturer explicitly declares that it is compatible with USB 2.0 (he writes about it both on his website and on a sticker on the USB cable). I do not know if it is possible to find other drives where the current efficiency of USB 2.0 will be too low, but I think it is safer to buy exactly those where compliance with the USB 2.0 standard is specified by the manufacturer.