What does 'Rebuild Database' do in Safe Mode, and how can it help with the 'An error occurred' error?

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Grade: Education Subject: Support
What does 'Rebuild Database' do in Safe Mode, and how can it help with the 'An error occurred' error?
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Rebuilding the database reorganizes the data on your PS4's hard drive. It doesn't delete games or save data, but it can fix corrupted files that might be causing the 'An error occurred' message. It can take several hours, depending on the size of your hard drive. Access it via Safe Mode option 5.