OneDrive
I get an error or file is not syncing when trying to sync folder or file which name ends in a dot?
Unfortunately OneDrive does not support folders or files ending with a dot, so trying to sync a folder named "MyFolder." or "MyFile.jpg." will fail with an error.
To solve this you need to either: rename the folder or file to not end with a dot, exclude it using a filter or use another cloud provider.
I get no error, but a folder or file name starting or ending with a space is not synced?
OneDrive doesn't support names that start or end with a space. FolderSync skips these items and lists them in the sync log as 'Ignored – provider limitation'. Rename the item or exclude it with a filter.
I get an error downloading HEIC files
This appears to be a long-standing bug in the OneDrive API that only allows for downloading the image part of of heic live photo: https://github.com/OneDrive/onedrive-api-docs/issues/1723
The issue is the OneDrive API reports the full file size for both image/video but only the image part is downloaded with the file. There doesn't seem to be any workaround that would allow Foldersync to download a file identical to the originally uploaded file.
To eliminate this error you can exclude the file or file type using filters.