Why is the progress bar when copying or downloading files not accurate?
When you upload a file from the internet to your computer, move a folder from one location to another on a volume, or install a new program, a progress bar appears to indicate how complete the task at hand is surely useful to indicate whether the process will take some time or be completed in a jiffy. However, if you focus on the estimated time to complete the task, which it displays alongside other data related to the file, you will notice that it changes randomly and is completely imprecise. The task is seen to be 50% complete in half an hour and suddenly the estimated time changes to 2-3 hours until the task is complete!
You have most likely encountered this situation one day, which made you wonder why the progress bars are so inaccurate in calculating the timing of the completion of the process? In fact, the topic needs to review several complex factors to understand the mechanism of progress bars, whether they appear during downloading or transferring files or installing programs, so let us explain the reasons from the following lines.