ITSI default backups do rotate, - in older versions the last one was overwritten - since 4.3 and later, the last 7 are kept. and the file name changed too include the date. see https://docs.splunk.com/Documentation/ITSI/4.3.0/ReleaseNotes/Newfeatures The backups you have seems to be in the new format. I do not know why the older ones are gone, is it a bug, did you clean up the folder during the reinstall ? if you wiped the kvstore, it's possible that the record of the backups was lost, and the old files cleaned up ?
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