I have been using Quicken for 20 years now. Some will recommend NOT to validate the data file on a regular basis (I do so at minimum of once a week) but I hold the opposite opinion and here is why.
There have been several occasions over the years when I did not validate my file and when I finally did there was a fatal flaw. I had to go back and find a backup file (I create these on a daily basis) that would validate properly. I then had to reconstruct and re-enter the data for periods of up to 8 months.
This December was a very busy month and I neglected to validate the file for four weeks. I had inputted a large amount number of transactions. I then put the data file on my laptop and headed out on vacation. The first day out I validated the file after a month of not doing so. There were error where a number of accounts had been deleted (no accounts had been deleted I could open them up just fine). It further stated that it would erase all of the transactions that were in the accounts that had been deleted, not a option. I backed up the corrupt file, then did the validate and repair on the file copy and it deleted all of the transactions it said it would.
I had to restore a file from 12/6/2019 in order to get a file that validated properly, then I had reenter a months worth of data that involved over 300 transactions/transfers/reconciliations/etc. in 18 accounts.
Quickbooks validates the data file before it does a backup. Now I realize Quickbooks is a completely different animal (I use it as well) but the reason it is done that way is to prevent you from backing up corrupted data. .
I would be nice to have this as an option when you are doing a manual backup of Quicken. I am currently validated the data file every other day at this point because of what happened. I am using Quicken Premier 2020 R24.11. The issue that recently happened did so on the previous release.