Occupied space strange behavior

Hello team,
wasnt checked dashboard for several months, can some one explain what does this means?


Why it is used “other”, earlier it was just used.
Also why on jun 2, Disk space used only 1 tb?
(same situation is on other my nodes)
for example:

Same procedure as every month?

hm? what procedure?
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Have you tried reading the rest of the comment you quoted?

For the drop of average used space: