I ran into a strange problem. My app scans through external sd card, find a 
picture it looks for, move it to a folder I created, and then rename it to 
a random name. Then when user requests, it will move the file out back to 
the original location. It works for other systems, but for HTC one M9, the 
path is /storage/6432-38301/, after it moves the file to the particular 
location, it worked. But when user requests to move it back, the app does a 
file.exists() call, it returns false. But using a file explorer to look 
through the file system, the file does exist. 

Any ideas on why? and how to fix it?

Thanks in advance.


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