Controller message log showing APs free file system space less than limit 90.0%.
Mar 31 16:00:01 2019: AP-b : %DIAG-4-FREE_RAM_DISK: Free system: file system space, 2.4% is less than limit 90.0%
Mar 31 15:59:53 2019: AP-a : %DIAG-4-FREE_RAM_DISK: Free system: file system space, 3.5% is less than limit 90.0%
Mar 31 15:59:46 2019: AP-a : %DIAG-4-FREE_RAM_DISK: Free system: file system space, 0.8% is less than limit 90.0%
Mar 31 15:59:16 2019: AP-a : %DIAG-4-FREE_RAM_DISK: Free system: file system space, 2.8% is less than limit 90.0%