I've got several set top boxes for my tv, all with different functions; one for digital tv and recording, a Blu-ray player (which I mostly use for Netflix) and a mediaplayer for the dvd's I have copied to an external HDD.
Today I came across the Roku, though not available in the Netherlands I should be able to order it from the UK or Germany. The Roku 3's got Netflix, and an USB port, though it supports limited file formats for the latter. But that can be solved by converting files. It's also small, easy to take with me on vacation or when house sitting. And I really love the headphone jack on the remote control, that eliminates the extension wire for my headphones from my tv (plus it makes the remote easy to find
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I just Googled if it really isn't possible to buy the Roku 3 in the Netherlands and I came across an article stating that, yes, Netflix is available in the Netherlands, however it won't work on the Roku devices.
So, it's back to searching for a new device.