lagostada :
29 GB is more than enough for a windows 8 install, as it takes around 20GB of space and it will be for short use while i get another ssd.
You didn't answer my question. Does it wipe the drive previously to install?
You'd have to make a partition, and install to that partition.
However.....as said above, 29GB is not nearly enough.
Yes, it will install. Now run all the existing updates. You'll find a Win 8/8.1 install to go well over 35GB.
Finally, important data with no backup? You are a drive fail or partitioning misclick from losing it all.