If most of your downloads happen within a web browser, you can change the behavior of the browser itself. Microsoft Edge & Google Chrome
Install (or OneDrive/Dropbox) from the Play Store. Link your cloud account. Create a "Folder Pair." Select your internal Download folder as the local source. sync android download location
Create a folder named in your cloud storage as the destination. Set the sync method to Two-way . If most of your downloads happen within a
Most apps default to syncing only on Wi-Fi. If your files aren't moving, check if you need to enable "Sync on Cellular Data." Create a "Folder Pair
Syncthing is open-source and incredibly powerful for syncing Android download locations. Install on both Android and your PC. Pair the devices using the QR code. On Android, share the Download folder. Accept the share on your PC and pick a destination folder.