Different space free reported via USB

I've noticed that if I have my phone connected to the computer via USB, the amount of space free reported by the application is different (less) than what's reported by the phone under Settings/Storage. I've got about 930Mb free yet both applications on the computer I've been using thinks there's 0Mb free.(tai nhac chuong doc):android-nerd::android-nerd::android-nerd:

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