As part of the lifetime validation, one will need to monitor the device age or wear and determine the write amplification factor that resulted from the workload that was applied to the storage device. There are three ways to access device age: (1) Use the lifetime estimate filed within the EXT_CSD. (2) Use vendor commands that are specific to Kingston eMMC devices. These commands can return the average block age of the device. (3) One can also send the aged device to Kingston for comprehensive analysis. To calculate Write Amplification Factor, one will need to determine the total Bytes written to the NAND flash and the total Bytes written to the eMMC device. Recall from earlier that WAF is the ratio of these values. Bytes written to the NAND flash can be estimated by the average erase count, multiplied by the device capacity. Bytes written at the eMMC device level can be obtained by several methods. It may be possible to monitor total Bytes written to the device from the host side application. All Kingston eMMC devices maintain an internal count of total sectors written to the device. This count can be accessed using vendor specific commands. Additionally, this can be extracted by submitting the device to Kingston for a full evaluation report.