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https://support.box.com/entries/20366301-Box-Sync-FAQ^{Image Removed}

Some select Limitations and Recommendations from the FAQ:

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Note: Hidden folders will be synced. Hidden files are not synced.

Versions Affected: All

2.2 Long file paths

Windows does not allow file paths longer than 256 characters. For this reason, Box Sync for Windows will not download any files that result in a path length of more than 256 characters. To prevent this, we recommend moving folders on Box to limit deep folder hierarchies.

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