Since the SMART data for hard drives is displayed in hexadecimal, it would be useful to convert the data to decimal in a second column, along with a heading for each data column (hex, decimal) to label the data.
Also, the SMART data is always padded with zeroes, making it hard to read single digits. Highlighting the non-zero digits in green or red would improve the visibility of the data.
SMART power-on time should also be reported in power-on hours, not just days, so it would be helpful to display both in the report. Since most manufacturers rate their hard drives at 50,000 power-on hours for average life expectancy, it would also be helpful to calculate percentage life expectancy using power-on hours as a percentage of 50,000.