I'm responding to everyone who is experiencing lags to try and determine the cause. The Online Banking one is one I suggested - seems like that applies to one case.  There was an option to delete them after matching that was presented in a one time message.  I don't think we should even offer that option - the software should just do it and clean out the old ones.  I'll enter a bug and hopefully we can just do that to make that issue go away.

Yes, running off a networked drive will probably be painful. You should keep the main file local to your computer (it is by default but you can of course open it from anywhere).  With the file open hit command-1 and you'll get a status window. At the bottom will be a control that shows you where the file is stored.  Click on that and you can open a window in the Finder where the file is stored. It have a .qbXXXX file extension where XXXX is the version year: .qb2022 for instance.  Quit QB and drag that file to your local Documents directory (or Documents/QuickBooks if you want to further qualify it - you may have to create the QuickBooks directory).  Then drag the file from the local location (Documents etc) to the QuickBooks application icon in your dock (Or in your Application folder) to make sure you are launching the local copy.  That should fix the issue.