[michaelmior]

Is the icon supposed to have a psb extension? It looks like a typo.

[shravan]

Nop, it's a reference to Photoshop's Large Document Format. [1]

[1]: http://helpx.adobe.com/photoshop/using/file-formats.html#lar...

[michaelmior]

Cool. It's been a while since I've used Photoshop on a regular basis, so I'm out of the loop. It just seemed odd given that psd is used directly underneath the icon.

[michaelbuddy]

Since I've know about it, I've liked the extension because in .PSB, the B is for big.

[photoGrant]

It's for files over 2GB. So referencing 500mb files confused me a bit, too.