Hello. First of all, i can't return the product to the store anymore, it's been more than a month since I bought it. Now, to the subject: my memory stick(Hama Laeta twin) isn't working, it doesn't install properly(it appears as "Removable Disk" in Computer, and there must have been the name I set). When I try to open it, it says "Please insert a disk into Removable Disk". I can't format it either. It worked before, but I tried using it as a data cable for my phone, connecting the USB head to the PC and the microUSB one to my phone. After that, it didn't work, I don't know how I fixed it after a few days, then tried it again after some time, got the same problem. I tried a lot of things before going to the manufacturer's website and read I shouldn't ever use both connections at the same time. At the store no-one told me that.
What I've tried:
changing drive letter paths
different programs(registry cleaners, formatters
uninstalling USB hubs
uninstalling all these: click here using other USB port
trying to find its software o the Internet, couldn't find anything
It doesn't work on any other device(phone, tablet, friend's PC).