Link: http://sharepoint.stackexchange.com/questions/89284/sharepoint-2013-mysite-increase-quota Central Admin Central Admin > Application Management Site Collections > Specify quota templates Edit an existing template and choose Personal Site. Change the values under Storage Limit Values to the values you want.
I do not need many words. This is a big shot from Microsoft. The first impression is awesome. It is clean and simple. And the new community style functions seem to be integrated better than I have expected. So just try it by yourself with the beta or see a few screenshots: My Site