File Storage, What Works

Hello r/Writing Members,

For those of you who hang on to your writing efforts regardless of genre or type, what has worked the best in terms of how and where to store your files?

Is the 'cloud' anymore foolproof than pen drives, CD, your device's C drive, etc?

Take-away, pen drives are said to last up to eight years, generally. I learned the hard way about six months ago and am still uncertain of what's next.