Here are a few options for a post regarding "PS4 9.00 Firmware," depending on where you are posting (a tech blog, a forum, or social media).
Always download firmware files directly from the official PlayStation website or trusted sources to avoid installing malicious software on your console. ps4 900 firmware download install
If you follow these steps exactly and still get an error, your PS4’s internal hard drive has likely failed physically. The good news is that hard drives are cheap and replaceable. The bad news is you will need a new 2.5-inch laptop HDD or SSD to start this process over. Here are a few options for a post regarding "PS4 9
Disclaimer: Modifying system firmware or attempting to downgrade firmware may violate the Terms of Service of Sony Interactive Entertainment and poses a risk to the hardware functionality of the console. This report is for informational purposes only. The good news is that hard drives are cheap and replaceable