PVR does not come with hard drive

I have the device for 8 weeks in use and am passionate about sound and picture quality.
The startup was simple and software update worked by itself.
The first 3 weeks I had ever glitches which over time became less and less, today no longer. Apparently, the box is capable of learning.
Point deduction there with me because:
1. The instructions with the actual pictures on the screen at all has nothing in common and you have to durchhangelen.
2. PVR function with me only with eienm USB stick works (32 MB = about 4 hours of recording), three experiments with different disks taught HD programs recorded only Ruckelbilder in programs without HD does the thing.
3. The support is absolutely Miess, no replies to emails, long queue at chargeable call.
Conclusion:
If the box does a great part.