Have you tried 'Personal Vault' in Microsoft OneDrive?I've messed around with other free/paid encryption software such as Axcrypt, FolderLock, and VeraCrypt. None of them are as easy to use as the AV versions.
Free version is limited to 3 documents. Included with Microsoft 365 for Consumers subscription.
Store and protect your sensitive files with an added layer of security in OneDrive Personal Vault. Keep digital copies of your passport and driver license secured.