My HTML app is writing three jpeg files to one directory. File 1 is written after 30 seconds, file 2 is written after 60 seconds and file 3 is written after 90 seconds. Then at 120 seconds, file 1 is written to the directory, overwriting the original file 1 at 150 seconds file 2 is written to the directory, overwriting file 2 etc. Let's say I start the app at 15:00 and check the app at 18:00, I will find that the time stamps for the three files are at around 16:10 even though the HTML app indicates that a file is being written every 30 seconds. Now if I open up a command prompt and go to the destination directory (where the JPEG files are being written to) and do a DIR command a few times, the time stamp on the JPEG files will start to change to 18:00 indicating that the directory is now again getting updated files every 30 seconds. The 30 second updating of each file will continue for about an hour and then the files are no longer updated in the directory EVEN though the app indicates that files are written every 30 seconds. Now I again open a command prompt and do a DIR a few times and AGAIN the time stamps on the files start changing again.