Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Doesn't this unit have any USB ports?
Document: As soon as I got it, I immediately bought a mouse for it, which I can no longer use b/c the USB ports don't work. So, now it's pretty useless. I would NEVER buy another ASUS product.
Standard manufacturer bloatware (I removed most of them).2. Ports for the laptop (no USB 3.0, eSATA - however there is HDMI, VGA, 4 x USB 2.0 and card reader).3. A single rubber bar for the touch pad's left/right click. Lack of tactile feedback and distinction from the left/right button may cause confusion to some users (good thing there's a mouse)4.
It gets "stuck" in a mode that emulates clicks when the button is not clicked causing pages to zoom instead of scroll.The keyboard often gets stuck with a control or shift key being pressed. We often have to press the shift key twice to get it unstuck. This keyboard is kept EXTREMELY clean. It is rarely used as we always have an external keyboard plugged in unless we are mobile or at a client site.Two of the four USB ports are now loose and often drop connections with the device.
Overall it's an amazing laptop, and the screen is incredible. Would give it five stars except for the lack of USB 3.0
I purchased this laptop, used it for about 8 weeks, and then had to sell it on Ebay for a $400 loss. The keyboard is absolutely terrible. Not only is the keyboard uncomfortable, but it misses about 1 out of every 5 keystrokes. If you never need to type anything, this unit might be good for you.
At around the middle the keys when pressed will flex and the keys will have a kind of spongy feel. There was a guy on youtube who said that it prevented him from typing too fast and I laughed at him, that is until I got my unit and started typing on it. The keyboard in particular has a long response time so when typing there will be a lot of compound words being formed. Is the keyboard durable and will it last?
*** --- ***Overheats*** --- ***Pluses:Overall, this computer is a miracle of creation. Runs great, nearly endless power. *1080p screen*4 USB*Back lit keyboard (Not the most important, but nice to have)*Blueray Reader*The mouse is brilliant, nice & responsive, with its two extra buttons, & the ability to change sensitivity on the fly!
Had the unit for 12 hours. In that time it took 10 hours to complete the 6 disk dvd backup. I didn't even get a chance to actually play games on it as it BRICKED within the first hour of setting up some software. I do mean BRICKED, no lights, no power indicators, ect.So in my opinion, pretty much sucks as a notebook. I am definetly looking elsewhere.
To be clear, I am not talking about accidental clicking on something on screen, I mean it will from time to time, open something from a pull down menu in the application you are in. I highly suggest keeping it off at all times, & only using the USB mouse. *The Keyboard, even though it looks cool, can be a bit stressful. From time to time you have to apply more force to a key than you should have to.
The LG screen is much better. Still looks ok.Only 3 USB, needs 4, minor.Looks like a Jet. Some like some don't.Bulky but not all that heavy, JUST fits in my bag.So to close i really like Asus but was losing faith in them from some of the problems i had with past PC's from them. Then i realized they design it, set it up ready to play, so just leave it as is.
Answer: The ASUS G73JH has total of 4 x USB 2.0 ports.