Exchange 2013 Database does not shrink

Question

 Hi
I'm  migrating  from  lotus  notes to exchange 2013  unfortunately  when converted  emails  from lotus  to pst  and imported into  exchange  I realized  later  that  a lot of replica
folders with  similar content were present  in users  mailboxes  hence this impacted a lot on the growth of  edb[database]
Problem
  I have delegated  access- full  logged  into user mailbox  deleted  the folders  and the  content . infact  on mailbox usage on the  mailbox properties  I see markable reduction of the  size of
the  mailbox   however all this does not replicate to  the database  size  the space it occupies on the  disk /drive.
  I have deleted   and emptied the  deleted folders  and set the  default retention to 0 days.  
But no change
[PS] C:\Windows\system32> Get-MailboxDatabase -Status | select ServerName,Name,DatabaseSize
ServerName                              Name                                   
DatabaseSize
S-HQ-EXMBX-01                           DB01                                   
200 GB (214,748,364,800 bytes)
S-HQ-EXMBX-01                           DB02                                   
228.8 GB (245,618,442,240 bytes)
S-HQ-EXMBX-01                           DB04                                   
235.8 GB (253,134,635,008 bytes)
S-HQ-EXMBX-01                           DB03                                   
239.6 GB (257,295,384,576 bytes)
Database
Drive
Total Storage
Available Storage
DB01
F
250 GB
6.29 GB
DB02
G
247 GB
6.15 GB
DB03
H
253 GB
3.34 GB
DB04
I
250 GB
4.60 GB
Total
1000
19 GB
Logs are on different  drive . L
  Any help or advise the storage is extremely limited  

Answer 1

So Ed is correct with his answer to shrink the DB's, however a few other issues to check and consider
Where are your log files located, i.e. if on the same drive it could be that you have allot of space being taken up by the log files, especially post import so I would check that first.  Normally these should be truncated/cleaned up post successfully
Exchange aware backup however I have seen the backup choke if there are too many logs.
If the deleted data is now marked as white space then as Ed states the external physical size will remain the same until you defrag or move all the mailboxes to a new DB. However this is going to depend upon your deleted item and mailbox retention settings,
i.e. if the deleted items have not past the current retention time frame then defrag nor the mailbox move will save you any space until those items have past the retention point.  You can of course set it to a lesser value
http://technet.microsoft.com/en-us/library/bb123971%28v=exchg.150%29.aspx and then let it sit for a day, check the white space and if its an ample amount continue with the defrag or MB move.
 What is the available white space within each database?   Run the following from Exchange PowerShell "Get-MailboxDatabase
-Status | select Name, AvailableNewMailboxSpace"
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