Q:

Problems attaching a SSAS database

I am attaching a SSAS database that I have just moved to a different drive following the below link:
Attach and Detach Analysis Services Databases
First I had to grant permissions on the new drive to the ssas services account:

Second when I attach the database I get the following error:

TITLE: Microsoft SQL Server Management Studio
Errors in the metadata manager. The operation cannot be executed since
  the database folder '\?\F:\SSAS\Data\Boden BI DEV 9_02.0.db' for the
  database with the name of 'Boden BI DEV 9_02', ID of 'Boden BI DEV
  9_02' already exists.  (Microsoft.AnalysisServices)

As you can see on the picture below

It says the database already exist, but I have detached it from the engine, as you can see on the picture below.

A:

I found what the problem was. I had not deleted the database from its original location, after I detached it.
I copied the database to the new drive, which on my case is T:.
After I deleted the database from its original location, in my case F:\ssas\data, then I could attach the database from T:.
After attached, I checked on the  F:\ssas\data folder and SSAS had created the following structure there, see below.

