Hi kma1717,
1. Is there any chance that you can run a test on Lenovo T420 ThinkPad with the latest version of PGP client - SED 10.3.2 MP2
2. Also are you able to run this test on a managed PGP client which has got this policy turn on (ticked on)
SEMS > Consumers > Consumer Policy > Default > Desktop button > Drive encryption tab are having "Allow User Management" ticked on Removable Disks
3. Can you check if you have got this policy enable on the server (if yes disable please)
SEMS > Consumers > Consumer Policy > Default > Desktop button > Drive encryption tab "Enable automatic encryption or locking or removable devices"
4. Is there any chance that you can test this scenario on Standalone PGP Desktop client to which you can connect external USB encrypted SATA device.
5. In the machine which you tested and was able to successfully get this up and running are you able to match differences with other machines (anything PGP versions, model laptop, OS versions and type, specific SEMS sever settings like users in different consumer group). You could run also msinfo32.exe to match the differences or WinAduit tool available from http://download.cnet.com/WinAudit/3000-2086_4-10832099.html
6. What is the model of this external SATA drive (name, brand)
7. Did you try to connect this encrypted drive via USB 3.0 or 2.0. Some models might not work with USB 3.0.