Laptop no longer Sees 2nd Sata Drive!

[pclaptop23]

My primary internal Sata HD (C:/ 500gb) was almost full and I wanted to backup Movies/TV/Music/Videos and Data to another supplemental drive.

I purchased a Sata HD caddy and a second Sata HD drive (E:/ 750gb) SEE PICS 1, 2, 3, that fits my DVD/CD slot on my IBM/Lenovo optical drive slot and xferred everything listed above over.

I then deleted the stored Movies/TV/Music and Videos from my primary drive (C:/ 500gb). I had been accessing this second sata drive(E:/ 750gb) in the optical drive caddy with no problems up until yesterday. Now the second drive in the DVD/CD caddy no longer appears under windows explorer (E:/)! It is as if there is nothing in the caddy. If I replace the caddy with the CD/DVD optical drive SEE PIC 4, it appears in the Device Manager ok, SEE PIC 7, but no longer appears in windows explorer as a device with a drive letter i.e. E:\CD/DVD Ram. SEE PIC 6

How is it that whatever device is in the optical slot (CD/DVD or the 2nd Sata HD) is no longer recognized by Windows 7 Ultimate?

If I start Paragon Partition Manager, under "Volume Explorer" it SEES the 750gb (698.6gb actual) and all of the sub-folders as well! SEE PIC 5

Why/How is it that Windows7/LenovoR500 stopped seeing/recognizing/displaying ANY device in the optical slot?

Thanks in advance for any input, advice or suggestions!

pclaptop23

 

[pclaptop23]

the last two pics 6 and 7