Some files became bigger and unopenable suddenly

[MaxC22]

Hi evreyone,I recently copied videos from my Android phone on my laptop and for safety on my external drive.10 minutes later, I moved (cut and paste) other videos from an other Android phone on the same laptop (without doing a backup).Suddenly, the 2 lots of videos changed their sizes, became bigger, and became unopenable. For the size, the first file (from the first phone) changed from 600Mo to 8,5Go (and for the size on disk it is written 2,9Go).It is weird because the total of the files are way bigger than the space I have on my laptop. I have only 128Go and the windows version is 10.0.1904

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