Downloading Ubuntu from Windoze Store proved quite an experience. Tablet on battery power at hotspot downloaded 40% of file, then download crashed. Tablet nodding off seemed to be cause, and even when set to not terminate internet connection while sleeping. Managed to activate wlan on my router, and with everything set to do nothing of disruptive nature on tablet, third go at download was successful although relatively slow.
Now it seems that if had windoze build 16215 or later, could also have had choice of SUSE. Anyway, having installed Ubuntu as Admin, wanted to see what would happen as ordinary user. Giving bash at command prompt then started off installation, with another download from Store, which went through very quickly, presumably due to admin download having been cached. So now have two copies of Ubuntu, with hard disk showing 25G used up. Next tried installing Nemo. Package manager had to download 117 M of files, and after extraction took up another 1G of disk space. Nemo could not function, due to lacking X display. So looks like being restricted to command line apps.
Also so far not been able to see how to access USB, as blkid does not work, and mount only shows /mnt/c, the windoze drive.
Linux porteus 4.4.0-porteus #3 SMP PREEMPT Sat Jan 23 07:01:55 UTC 2016 i686 AMD Sempron(tm) 140 Processor AuthenticAMD GNU/Linux
NVIDIA Corporation C61 [GeForce 6150SE nForce 430] (rev a2) MemTotal: 901760 kB MemFree: 66752 kB