To save the seeds, I printed them out on paper and made a few copies. I kept one copy in the personal vault of the office, one copy at home, another copy locked in an iron chest. For personal use, I keep the seeds in a specific pendrive, to prevent the file from being deleted, I put the seeds in the pendrive and locked it with password by the help of antivirus. 
Exactly this is one of the best idea to keep the seed in secured. I did follow the same idea and i never face any trouble still and hope my account will be secured for all the time. What do you mean by pendrive?
Why print out the seed? Why not write it three times instread?