The card said "911.9G · 808.4G free · ext4". The filesystem type is a
Details row, not something you choose a drive on, so it goes.
On percentage vs size: which one matters depends on the question. This
step asks "will my data fit?", and absolute free space is what decides
that — a 4 GB disk that is 89% free is still useless for a media library.
Percentage answers "is this filling up?", a health signal rather than a
placement one. So the text carries the magnitude ("808.4G free of 911.9G")
and a thin bar carries the proportion, which is what the eye reads
fastest, with no second number competing with the first.
The bar fills with FREE space, not used. Filling by usage made a healthy
7%-full disk render as an almost-empty track that read as a broken widget
— and it pointed the opposite way to the text beside it. Filled = room to
spare, draining = filling up, matching the words. It turns amber below
25% free and red below 10%.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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