If backup-thread-priority: set to lower number i getting this error message and backup doesn't work.

.... [15:38:28 WARN]: Exception in thread "Thread-160" java.lang.IllegalArgumentException
.... [15:38:28 WARN]: at java.base/java.lang.Thread.setPriority(Thread.java:1141)
.... [15:38:28 WARN]: at ratismal.drivebackup.UploadThread.run(UploadThread.java:54)
.... [15:38:28 WARN]: at java.base/java.lang.Thread.run(Thread.java:834)

Hi!

Are you running 1.2.0? In this version, I set the backup priority to the lowest possible value by default.

Yes, make sense then. Negative value was left over from older version config.
It works fine with default value.

Great