OneDrive - can files be excluded from being synched?

[curious]

Have some files with personal info that I don't want in the cloud. 1) I deleted them by clicking on the icon in systray but some with extension .json remain. Is it safe to removed those?

2) Can I exclude those particular files from being synched? OR, do I have to manually remove them each time I access that file?
Thank you very much

[HansV]

I wouldn't worry about the json files.

As far as I know, you cannot exclude individual files from syncing - you'll have to move them to a folder that is not synced by OneDrive.

[curious]

SO manually excluded them might work? Or will the file 'sneak' through before I get the chance to delete it, if you understand what I'm asking.

[HansV]

If you move a file to a folder that is not synced by OneDrive, it should disappear from the cloud and all other devices connected to the same account.