Package id 0:  +51.0°C  (high = +86.0°C, crit = +100.0°C)
Core 0:        +47.0°C  (high = +86.0°C, crit = +100.0°C)
Core 1:        +47.0°C  (high = +86.0°C, crit = +100.0°C)[/quote]
I forgot to add: this should be during syncing, not while idle. If you checked while syncing, the temperature isn't the problem.

[quote author=kemist link=topic=5405915.msg60561983#msg60561983 date=1657735890]
How do I confirm that the HDD is the problem[/quote]
I've used [url=https://linuxreviews.org/HOWTO_test_SD_cards_and_identify_fake_ones_(mostly_sold_on_ebay)]fdwrite and f3read[/url] to test SD cards. If this gives an error on your hard drive (which should be empty to test all sectors), you know for sure it's the problem. But I doubt you'll get an error on a HDD this way.