Exchange Storage Planning and Testing: http://blogs.technet.com/b/exchange/archive/2011/01/07/3411776.aspx

http://exchangeserverpro.com/exchange-2013-move-database-to-new-folder-path/

Adjust to meet your needs:

Move-DatabasePath "Mailbox Database 1480691381" -EdbFilePath "E:\Exchange\Mailbox Database 1480691381.edb" -LogFolderPath "E:\Exchange\Mailbox Database 1480691381"

https://justaucguy.wordpress.com/2012/10/05/exchange-server-2013-preview-remove-original-database/

http://exchangeserverpro.com/defrag-exchange-server-mailbox-databases

http://exchangeserverpro.com/defrag-exchange-2010-mailbox-database

http://blogs.technet.com/b/exchange/archive/2012/01/30/3470667.aspx

Show quota settings:

get-mailbox -server "server" -ResultSize unlimited | Where {$_.UseDatabaseQuotaDefaults -eq $false} | Sort-Object DisplayName | ft DisplayName,IssueWarningQuota,ProhibitSendQuota > C:\quota_exceptions.txt

Show quota usage:

get-mailbox -server "server" -ResultSize unlimited | Where {$_.UseDatabaseQuotaDefaults -eq $false} | Get-MailboxStatistics | Sort-Object DisplayName | ft DisplayName,@{label="TotalItemSize(MB)";expression={$_.TotalItemSize.Value.ToMB()}} > C:\quota_exceptions_size.txt