Okay, discovered files which were good for Geotagging photographs are too long to OSM in terms of fair share of processing time.
Now cutting track logs down to below < 5000 points where possible.
Highlands of Scotland - 10 years of GPS track logs, but only plan to upload tracks under 5 years old as well aware of new road layouts in certain areas of the highlands.
Derbyshire/Staffordshire Peak District, uploading extensive data covering white peak.
Lake district, less popular areas, uploading data covering western and northern areas.
Royal Deeside, minor roads.