[ubuntu] Installing ubuntu on pendrive.

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http://ubuntuforums.org – I'm an android developer, eclipse is very slow in my Ubuntu, booting time is also very high. So I decided to buy a USB 3.0 Pendrive and install my Ubuntu, eclipse, and android SDK in it. A friend of mine suggested that it is not recommended to install Ubuntu on a Pendrive since it will reduce the life of the pendrive and I must ask about it in the forum. Please let me know what you think. Also suggest me whether I should use a 32GB pendrive or is 16GB enough. Thanks in advance. (Hardware)