Unlike when hiding files on Android, you don’t need any special software to do it on ChromeOS
open the Files app
Next, find the file you would like to hide and click the three-dot menu icon in the top right
Select Show Hidden Files That might seem like the opposite of what you want
Right-click the file or folder you want to hide and select Rename from the menu
add a period to the beginning of the name and hit Enter
unselect Show Hidden Files
just click show hidden files when you wanna see the files you have hidden again
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