"Always keep on this device" does not work on Mac

bendahmen 

Welcome to Microsoft Tech Community, My name is Recep i'll be happy to help you today.

 Here are some possible reasons and solutions for this issue:

- One reason could be that your OneDrive sync app is not up to date. You can check for updates by clicking on the OneDrive icon on the menu bar, then selecting More > Preferences > About > Check for updates.

- Another reason could be that your OneDrive storage is full or close to full. You can check your storage usage by clicking on the OneDrive icon on the menu bar, then selecting More > Manage storage. You may need to free up some space by deleting or moving some files to another location.

- A third reason could be that your OneDrive sync settings are not configured correctly. You can check and adjust your sync settings by clicking on the OneDrive icon on the menu bar, then selecting More > Preferences > Sync and Backup. Make sure that the Files On-Demand option is turned on, and that the folders you want to keep offline are selected under Choose folders to sync.

- A fourth reason could be that your files are corrupted or have sync errors. You can check for sync errors by clicking on the OneDve icon on the menu bar, then selecting View sync problems. You can try to resolve the sync errors by following the instructions on the screen, or by resetting the OneDrive sync app:Open Command Prompt with admin rights and run the following command: %localappdata%\\Microsoft\\OneDrive\\onedrive.exe /reset. Wait for two minutes and then run the following command: %localappdata%\\Microsoft\\OneDrive\\update.

I hope this helps you fix the problem and enjoy using OneDrive.