1. Ensure the legacy device is functioning properly before powering down the system.
2. With the system off, replace the legacy device with the iR2321.
3. Remove a hard drive from the legacy device and install it into the iR2321.
4. Turn on the system, ensuring only one hard drive is installed in the iR2321 initially.
5. Upon booting, verify that all information is accurate and correct.
6. Once you've verified the accuracy of the data, proceed to insert another hard drive (either from the previous model or a new one) into the iR2321 while the computer remains powered on. The iR2321 will detect the newly added hard drive and automatically initiate data rebuilding.
7. Completion of the data rebuild signifies the successful update of the system.
* NOTE 1: If the legacy device is currently rebuilding data, please wait for this process to finish before undertaking the steps mentioned above.
* NOTE 2: In cases where the legacy device has only one functioning hard drive, ensure you back up its data prior to starting these operations to prevent potential data loss from hard drive failure during the process.
* NOTE 3: If the old model contains two hard drives, it's advisable to retain one of them as a precautionary measure to prevent damage during the process, which could lead to irreversible data loss.