Android 13 introduced a new security feature to block user apps to read notifications. I got this issue when I setup Huawei Health app for my band. Android 13 has built in solution for this limitation. Go to Settings -> Apps, open the app setting with this issue. There are 3 dots at top right corner, click it to "Allow restricted settings" If you cannot found this 3 dot menu, please remind only the app already triggered "Restricted Setting" popup will show this menu. Just use the app to request notification and get the error first.

Time machine is a powerful tool to protect all files on Mac, but maybe sometime you only need a simple alternative way. Here I want to share a way to use build-in rsync command backup a folder to antoher place. You only need one command line: Here work/AU is source folder and bak is target folder. They are on different hard disk. Let me explain some parameters: -a copy files with original create time and attributes. -v show detail progress --delete remove files not at source folder --exclude skip backup some files -c compare files to optimize network transmission. I do not need it since I only copy it at local. You can use build-in crontab command to schedule it, for example I want it run every 4 hours. Use crontab -e to configure crontab job, input following configuration and press escape and input :wq enter to save changes.