This is absolutely false, or as the kids call it, "misinformation".
A 3 second Google search confirms:
100 emails contained information that should have been deemed classified at the time they were sent, including 65 emails deemed "Secret" and 22 deemed "Top Secret". An additional 2,093 emails were retroactively designated confidential by the State Department.
The whole issue with her emails is she purposely never labeled anything so as to have plausible deniability.