Now that I've tested it some more, it actually works faster than a 4GB stick. Somehow it does. And overall works like a charm, if not for the fact that phone can't show actual free space if bigger than 4GB. This isn't an issue for me, since I already filled up more than 5GB. And it should't be an issue for anybody else either, cause think about it, if you intend leaving 4GB or more free, then why do you need an 8GB M2 anyway, right? Get 4GB or something.