"Logging is enabled" - uncheck this box if you don't want to keep the task activity in a log file.
 

"Log file folder" - a path to the folder where the log file should be stored. The changes will take effect after the restart of server module of AnyFileBackup.
 

"Keep log data, days" - to save a disk space a log file can be cleaned from the old records. Specify a number of days the records should be kept in the log file. To avoid the old records cleaning specify 0 in this field.

 
"Old log records" - to remove the old records manually press the Remove button.