Hi, I have the same issue. I moved from an old laptop to a new one (always Win10) and the time for the backup increased drastically. Now the rate is 10 GB/hour (USB3 connected external HDD, no compression): I tried to run a backup on 200 GB, previously required about 3 hours, now it was not finished after 12 hours (about half). I used Areca 7.5 (trying also 7.3.5 and to delete the temp file). Any help? thanks