That just looks like access to the forum.
Look for high cpu access on the cpu tab or very high disc access on the disk tab.
Turn off audio analysis when importing. (import settings)
If it’s a spinning drive, change thumbnail threading to low. (search for threading in options)
Turn off waveform analysis in options (search for waveform)
Your external drive disconnect points to bad usb port, cable, or lack of power that’s showing up because of heavy use.
Does it have an external power supply? If it’s a spinner the power supplied by the usb cable may be marginal under load.