diff --git a/seqs/backup.sh b/seqs/backup.sh
index 1c5ea8e..7054d3f 100755
--- a/seqs/backup.sh
+++ b/seqs/backup.sh
@@ -187,7 +187,9 @@ step_3() {
   exep "mv -f '${buTarget}/${buLog}0.log' '/tmp/${buLog}1.log' 2>/dev/null"
   exep "'${sq_toolBin}' ${customFlags[*]} --info=stats2 ${buExcludes[*]} '${tmpSource}' '${tmpTarget}' > '/tmp/${buLog}0.log'"
 
-  exe mv -f /tmp/"${buLog}"*.log "${buTarget}"
+  # mv is not the right tool moving files to a different file system
+  exe cp /tmp/"${buLog}"*.log "${buTarget}"
+  exe rm -rf /tmp/"${buLog}"*.log
   exe sync
   if (( remount )) ; then
     exep "mount -o ro,remount '${buTarget}' >>/dev/null 2>&1"