It really only takes a minute! It may take longer to backup every file you have, but it can only be an instant and everything is gone to cyber heaven (or hell... you decide)
An interesting web link about World Backup Day
I have my files backed up continuously through Dropbox but I also bought a 1TB (Terra byte) external hard drive that plugs into my PC and I just do a simple copy/ paste of my files, though they do include software to automate the process. Not such a bad idea is it?
My files are important and losing them? Not an option!
Happy World Backup Day 2016!