How do I change the default import location?

I second those who recommend creating an import preset (at the bottom of the Import dialog box). I created one that not only saves my preferred location but lots of other settings, such as preview handling and metadata. In most cases, when I open the Import dialog box, the selected import preset is the same one I used last time so all I have to do is click Import.

The other major reason to use an import preset is because a quick glance lets you know right away if any import settings are wrong. When I open the Import dialog box, I take half a second to look at the Import Preset menu at the bottom. If it’s the name of my preset, I know everything is OK and I click Import. But if that menu says anything other than my preset name, I have to stop and take a closer look.

For example, if I accidentally clicked a different destination folder and didn’t notice, any settings change causes the Import Preset menu to say “[preset name] (edited)” which means it is now a deviation from the preset. So I know I must stop, and then fix it just by choosing my preset name, which in one quick step makes all settings correct and safe to continue.

A followup observation. From your screenshot (that I have modified and annotated)

Are you automatically syncing your LrC catalog with OneDrive? If in LrC you click on Help, then System Info, does the Library  path include the word OneDrive?

If so, consider stopping that. THe use of OneDrive in LrC is an issue, especially if OneDrive is acting up. At the very least it slows LrC performance down.

If you are not syncing to OneDrive, but perhaps some photos were imported to OneDrive, consider changing that. Storing photos on OneDrive for use in LrC can fail.

The destination should revert to the destination in the previous import. That is to say, if last time you imported you selected the H drive, then the H drive should show up as the destination. That is until you change it, then the next time the destination will be what ever you selected.

If the destination is not whatever it was on the previous import, then your preference file may be corrupt.

The preference file, and this is an actual file on your computer, can get corrupted leading to all sorts of odd behaviour. Following is a link on the why/how to reset the preference file:

• https://www.lightroomqueen.com/how-do-i-reset-lightrooms-preferences/
• https://helpx.adobe.com/lightroom-classic/help/setting-preferences-lightroom.html

Note that resetting the preference file will reset some of your actual preference settings to defaults

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Note that I will make a followup reply separate from this one, as I see a potential issue not related to your initial problem

Typically LrC will default to beginning with the last used import selections but sometimes this may not happen. For example, maybe last time you did an Add import but next time you are importing from a card reader (removable device) in which case LrC automatically switches to a Copy import instead. In my opinion it's not a great idea anyway to trust previous settings to repeat themselves: you can get unwanted surprises that way. Maybe you had set a develop preset or batch keywording specific to some prior import, and now without noticing, those have been inherited onto subsequent imports too. So it's a good idea IMO to re-initialise everything.

Best way I've found is to save a whole import setup as a named preset. That will include what type of import (such as Copy), the particular destination, scheme within that destination (such as, into auto-dated subfolders) and whatever else you want too - choice of metadata preset, emptied batch keywording panel to clear anything potentially persisting from before.

So re-selecting this import preset by name again every time (bottom of the import screen) guarantees predictable results each time without the need to re-check everything. Maybe differing import requirements occur:  if so you can reflect those repeatably via multiple (tried and tested) import presets.