Back-up Copy~ WAV vs FLAC Options

[LimitBreaker15]

I wanted to have a permanent back-up copy of my audio files so I wanted to hear others' opinions on this matter. I know there have been many threads of this kind, but let's tackle a BIT different topic...

I'm not really good with audio, but I did my research. Anyways...
I know majority of people will say, "You won't hear any difference, stick with flac" or the likes, but I wanted to get the most 'suitable' format for my back-ups. Suitable as in, closest to the original.
WAV PCM is an uncompressed audio. FLAC is a lossless compressed audio. Isn't it better to stick with WAV if I wanted to just convert it to flac or other formats later rather than convert it from flac? I mean, look, FLAC is already compressed...

and...

WAV > FLAC = √
FLAC > WAV = x <<< less filesize than the original



'I know that nothing useful is lost...and the only thing that makes WAV files that large are excess bits and header size...'
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Will this fact really solve my dilemma?


I wanna know your opinions...if it were in your case, would you stick with uncompressed or lossless compressed for your back-up copies...

Oh, and let's assume storage size isn't an issue.