How to check free space on memory card

Comments

Note from the moderators:

• Please specify the devices that were used with this code snippet.
• Please improve the Overview section. (for now, it does not contain, what it is supposed to contain)

Code is incorrect

EMediaNANDFlash - it is type for internal memory, so called sysmtem drive. So you are measuring free memory on system drive, not memory card.

Jp4symbian - Memory card or mass memory?

Has anyone figured out how to differentiate memory card from mass memory. Both have similar TDriveInfo type of EMediaHardDisk.

Also PathInfo::MemoryCardRootPath() returns the Mass memory drive rather than the Memory card drive.

jp4symbian 16:00, 13 October 2011 (EEST)

Hamishwillee - See response to other query

Look up KDriveAttRemovable

hamishwillee 03:53, 14 October 2011 (EEST)

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Article Metadata

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Tested with

Devices(s): N78

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Compatibility

Platform(s): S60 3rd,3rd FP1, 3rd Fp2

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Platform Security

Signing Required: Self Signed

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Article

Keywords: keywords=TDriveInfo,TDriveInfo::Drive(),TDriveInfo::Volume()

Created: lming (01 Nov 2008)

Last edited: hamishwillee (22 Nov 2011)

This snippet shows how the application can check whether there is enough free space on a memory card before attempting to save a file.

Source file

//necessary library
LIBRARY efsrv.lib

//necessary header file
#include <f32file.h>
 
RFs fileSession;
TVolumeInfo volumeInfo;
 
//open RFs session
fileSession.Connect();
 
//freeSpace will store number of free memory card in Bytes
TBuf<64> freeSpace;
TInt64 freeKBytes;
//Contains drive information.
TDriveInfo driveInfo;
 
//check all drives from A to Z
for (TInt driveNumber=EDriveA; driveNumber<=EDriveZ; driveNumber++)
    {
    //Gets information of this drive 
    fileSession.Drive(driveInfo,driveNumber);
 
    //if this drive is EMediaNANDFlash,we find drive of Memory card
    // also reported my DiBo Members that on some devices it can be EMediaHardDisk 
    // ref: [http://www.developer.nokia.com/Community/Discussion/showthread.php?156990-Free-system-memory]
    if(driveInfo.iType == EMediaNANDFlash)
       {
       //recode its free space in bytes
       fileSession.Volume(volumeInfo,driveNumber); 
       freeKBytes = volumeInfo.iFree/1024;
       freeSpace.Num(freeKBytes);         	
       break; 
       }
    }
 
....
//close RFs session
fileSession.Close();

Postconditions

The freeSpace variable the free memory space in bytes, on the memory card.

Internal Links:

• How to check disk drive storage space
• How to check if device has memory card or not