Manually Upgrade/Downgrade firmware by Qfinder
Procedures
Follow these steps below to upgrade/downgrade the firmware of your NAS.
1. Find the model name and firmware version of your device by this method.
2. Go to Download Center
3. Select NAS/EXpansion as Product Type, find which type of your NAS, Model then choose Operating System to download the desired Firmware Version you want to upgrade/downgrade.
3. Click on the Remarks button to read the release notes for the selected firmware version as they may contain specific instructions
4. The downloaded file is a zipped file, please extract image file from it.
5. Open Qfinder and select your NAS first then find Tools > Update Firmware.
6.Input admin and Password of admin.
7. Select Path of system firmware image file and Browse the img file on your PC/Mac. 
8. If the selected firmware version is older than the current firmware version, following prompt will pop.Please read them and check I have read the above and understand the risks of downgrading firmware if you want to proceed, click OK.
9. Wait for firmware upgrading process finished.
Related links
1. Manually Upgrade/Downgrade firmware by QTS web interface
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