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Do you have a dell part number for the 'Optiplex 3020 7020 9020 2.5 inch caddy' ?
The Optiplex 3020 7020 9020 R494D 2.5 inch caddy fits inside the DN8MY 3.5 inch blue caddy for the Tower.
The Desktop and SFF have different part numbers for the Internal 3.5 caddy but that does not matter because the R494D converts the 3.5 to a bracket that holds 2.5 inch drives and then snaps into the 3.5 caddy.
The Silverstone adapter has all the mount points of a standard 3.5" hard drive, and it's only $8 with free shipping. It holds two 2.5" devices stacked.


Report Unresolved Customer Service Issues
here
I do not work for Dell. I too am a user.
The forum is primarily user to user, with Dell employees moderating
Contact USA Technical Support
The Optiplex 3020 7020 9020 R494D 2.5 inch caddy fits inside the DN8MY 3.5 inch blue caddy.
The Silverstone adapter has all the mount points of a standard 3.5" hard drive, and it's only $8 with free shipping. It holds two 2.5" devices stacked.


Report Unresolved Customer Service Issues
here
I do not work for Dell. I too am a user.
The forum is primarily user to user, with Dell employees moderating
Contact USA Technical Support
Do you have a dell part number for the 'Optiplex 3020 7020 9020 2.5 inch caddy' ?
The Optiplex 3020 7020 9020 R494D 2.5 inch caddy fits inside the DN8MY 3.5 inch blue caddy for the Tower.
The Desktop and SFF have different part numbers for the Internal 3.5 caddy but that does not matter because the R494D converts the 3.5 to a bracket that holds 2.5 inch drives and then snaps into the 3.5 caddy.
The Silverstone adapter has all the mount points of a standard 3.5" hard drive, and it's only $8 with free shipping. It holds two 2.5" devices stacked.


Report Unresolved Customer Service Issues
here
I do not work for Dell. I too am a user.
The forum is primarily user to user, with Dell employees moderating
Contact USA Technical Support