Thank you for testing. Although you had good results are there any areas that you would improve?I downloaded the file and it took about 15 seconds to open. Not bad for the size of the workbook. Then I scrolled through each sheet. Each opened immediately. The issue may not be the workbook, but it may be your machine or the version of excel you are operating. I am running an HP with an intel processor 11th gen i5 with 12 gigs of Ram. Windows 11 and O365.