There is a way to clean all data on your E: drive. Just simply press win key + X and it will pop out a small window. Click on Disk Management and then you will see a windows that listing your all disks.
Right click on your drive E: and format it.
OR
Right click on your drive E: and click on delete volume. Then click yes. After doing them, right click on that unallocated volume and click new simple volume. Then keep click on "Next" for two times then at the Volume Label, you can rename it or just click next. Click Finish after these steps
Hope it helps you!