This has a couple of close votes as too localized. As someone who personally is quite interested in the answer to this question, since I've heard of the problem before and would like to know how to solve it, I don't feel this is too localized. (I do think we may need to get more information from the OP to give more answers, however.)

• http://askubuntu.com/questions/174804/i-cant-copy-to-external-drive-read-only-error-cant-change-permissions-even-f

Why might this be too localized?

^{(All perspectives welcome, but as the wording of the title suggests, I'm particularly interested in answers from people who believe it should be closed as too localized.)}