What is this icon - square with upward bar in the right upper corner of my phone?

[AC Question]

meaning of icon square with right upward bar

This icon appeared and I don't know what it means

 

[Golfdriver97]

Re: meaning of icon square with right upward bar

See other thread for replies: http://forums.androidcentral.com/ask-question/487142-con-square-upward-bar-right-upper-corner.html

Thread closed to avoid confusion.