Volume fragmentation

[SANTANDER]

Two hard drives, 80GB and 160GB. 1st HDD contains operating system, program
files, many files, and intensively used for 4 years, 2nd HDD(160G) is new,
used just few months and contains jonly files. When analyze for volumes
fragmentation, it is shown that I do not need to defragment C: volume: Free
space: 45%, total fragmentation - 3%, File fragmentation - 6%. But when
analyze 2nd volume(160GB), it show that I should defragment this volume:
Total Fragmentation - 20%, File Fragmentation - 41%,though Free space - 97%.
Why the 2nd volume so deeply fragmented, whereas it have Free space 97%?
Should I ingnore analyze and there is no needs to defragment 2nd volume?

Thanks.

 

[Bob I]

Because there are not very many files on the drive, having only a few
fragmented files makes a very large percentage. Defrag it if you feel
like it or just ignore it, because as you add more contiguous files the
percentage will drop all by itself.