I think your time would be better spent removing the junk.
This might help you identify the junk: PRTDIRINF

Print Directory Information (PRTDIRINF)

Type choices, press Enter.

Type of report . . . . . . . . . > *DIR *DIR, *OBJ, *OWN
Information file prefix . . . . *LAST Name, *LAST
Information library . . . . . . *LAST Name, *LAST
Owners . . . . . . . . . . . . . *ALL Name, generic*, *ALL
Objects . . . . . . . . . . . . *ALL

Object types . . . . . . . . . . *ALL *ALL, *ALRTBL, *AUTL…
+ for more values
Directory subtree . . . . . . . *ALL *ALL, *NONE
Smallest size . . . . . . . . . 0 Size in number of kilobytes
Sort by . . . . . . . . . . . . *SIZE *SIZE, *OWNER, *LSTCHG, *NAME
Include path names . . . . . . . *ALL *ALL, *NONE

Voodoo
———————————————————————————-

================
First, you need to clarify if what is IFS QDLS means this is for the other readers to understand your question. You can use a third party software to perform the defragmentation of your hard disk drive. Based on the rate of storage you have mentioned, I believe that it would be better if you will add additional storage device for more storage space.