Gunnar,
I save the waveform on the USB drive and with the file options menu I can retrieve them and download them into FlukeView (demoversion).
Maybe you are wondering why i have bought a Fluke?
I was using the Tek THS720 but that unit last ony a few years in a rough environment. The Fluke is...
I have recently bought a 190-104.
I can store more that 1000 waveforms when I use the USB as extra memory.
No problems with the communication. I had to remove the USB drive when I connect to my PC as told by the manual.
I think you have to send in the unit for service.