Failed to open the project folder after location to external hard drive in Trados 2019 (Freelancce)

Question

Since my computer storage is low, then I change the project folder under C and D drive to my external hard drive. 
 I opened the "Project Settings", click opened the project, then change the location "C:\Users\asus\Documents\Studio 2019\Projects\..." to be "F:\Trados文件\....". 
 After completing the above operation, trados operates as usual, except for some files disappeared from the project list after I moved them to the external hard drive. 
 I can import file to trados, and work on it. When I re-open trados, everything changes. All project list disappeared. When I click "Project" on the left menu bar, it shown errors as below, and then trados flash back at once... 
 When can I do now? URGENT.

Sorin Perta · Answer

We will be pleased to help you with this problem so have logged a support case on your behalf. We do prioritise customers who have a support contract so please keep in mind it could take up to 48 hours, especially over a weekend, but rest assured we will contact you as soon as we can. You will be contacted at the email address used for this Community. Support Case Id : 00706224 .

Jerzy Czopik · Answer

Mona Akabawy 
 I cannot read your error message, but the behavior you describe points me to a defective projects.xml in your Trados. 
 The simplest way to deal with that would be deleting the projects.xml fro Studio xxxx/Projects folder within your Documents folder in Windows, then start Studio and use the command "Open Project" from the projects view to restore the projects you want to work with now. Manipulating the *.proj file is not the best idea, much better you simply move the complete project to a new location and open it from within Studio from there. Double clicking the *.sdlproj file in the new location should also have the same effect. 
 Please note: although you can move projects easily, you cannot do this with the resources like TM or TB. These MUSt remain exactly in the same location as they were when the project was created. However, this does not apply to projects received as packages, where the resource settings were not modified.

Trados Portfolio > 2. Licensing and Installation

Failed to open the project folder after location to external hard drive in Trados 2019 (Freelancce)