Importing dae files (Collada) into Blender

I’ve recently been convinced by my friends on Discord that since I am doing so well with my Sketchup models, its time to upgrade to Blender.

I’m using a Chromebook these days as it is just so handy to carry around. While it is small, I can do some good work with it. Now here is my problem:

Having added Blender 2.79 via Linux, that worked well. But the issue is importing files.

I know the principle and after clicking on import/collada, I have a new window opened.

on the left side under ‘System’ where I do assume I find my file; there is no option for searching through my Chromebook to locate the file itself. I have that stored in ‘downloads’.

Any help with this issue would be greatly appreciated.