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Calculate Folder Sizes Automatically


Folder size calculation can be automatic or on-demand, depending on your preferences. Size calculation is performed in the background and does not block concurrent use of the lister, but it also causes disk access as the directory structures are examined so you may not want it to be done automatically, at least for certain drive types.

If you select one or more folders and run the GetSizes command then Opus will calculate their sizes and display the information the same way size is displayed for files. If you run the same command with no folders selected Opus will calculate the size of all folders.

[ul][li]GetSizes command: On the default toolbars, the GetSizes command can be accessed via Edit -> Calculate Folder Sizes (Ctrl+L).[/li][/ul]

[ul][li]Tip: Edit the GetSizes button and change its command to GetSizes NODESELECT if you don’t want your folder selection to be cleared after the button is clicked.[/li][/ul]

You can also ask Opus to calculate folder sizes automatically every time you change folder. In Preferences / Folders / Folder Behaviour* the setting Calculate folder sizes automatically for… can be configured for all drives, all local drives, or fixed (non-removable) local drives, or you can switch it off entirely.

(*In Opus 9 and earlier, the Preferences page was called ‘Options’ rather than ‘Folder Behaviour’.)

This general setting can be overridden for specific folders (as well as more specific types of folders) via the Folder Formats system. If you go to Preferences / Folders / Folder Formats, edit one of the formats and switch to the Options tab then you will see a setting called Get folder sizes. Normally this is set to default, which means the general setting is used, but you can also force it on or off for the particular format.

In addition to this, if you have added the Total File Count (AKA Files (total)) column or the Total Sub-Folder Count (AKA Folders (total)) column to your file list then Opus will always calculate folder sizes while calculating the total file/folder counts.

Cached folder sizes…

Some people like an add-on for Explorer called Folder Size for Windows Explorer because it caches the folder size information using a background service. This caching functionality is unlikely to be built into Opus as it requires a background service with full system access and memory overheads and there are issues with reliably tracking changes in the folder size data, especially while Opus is not running and during system boot and shut-down.

However, if you like Folder Size for Windows Explorer then you can use it inside of Opus. The add-on works just as well within Opus as it does within Explorer. In fact, it works better with Opus since, unlike with Explorer, it even works with Opus under Windows Vista. Ensure you have installed the 32-bit or 64-bit version which matches your version of Opus and then add its column to your Opus file display via Tools -> Folder Options and the Special category of columns (where all 3rd party shell extension columns are listed).

Displaying folder size
Calculate Folder Sizes Automatically issues
Slow on one machine (was: Slow after W10 Update)
Button for GetSizes plus Get Total File Count
Suggestion: show info for empty dirs in thumbnail view
Can't control "get size" on network, and other places
Force folder size
Lister not showing correct folder size
Automatic folder size calculation
Prevent DO from Calculating the folder size for a particular drive
Can't control "get size" on network, and other places
DO 09 Folder Size and Report
Suggestion: show info for empty dirs in thumbnail view
Ctrl+L is not calculating folder size
List of FAQs organised by topic
Folder & File Size
Relative Size works on files - but not on folders
Automatic updating of folder sizes?
Status bar code for total size
Automatically show folder size in details mode
Slow performance when changing!
Total folders & file space problem (affecting Infotip info)
Have buttons for *.pdf, *.doc, etc.?
Persistant Directory Size Calc
Folder Size for Windows Explorer
Folder Size Problem
NOT so happy with dopus anymore (stability, foldersize calc)
Prevent auto-calculation of folders size on specific drives
Feedback from a beginner, but experienced software designer
Foder size not working for all drives?
Calculatating folder sizes and relative size graphs
Remember the sizes
Calculate folder sizes automatically for
Slow Network Access
Button to switch to random view
Is it possible to get size of selected folder