Worksheet for Calculating the Save Data File System Capacity

This calculates the amount of data that can actually be saved in save data.

With save data, data is managed at a fixed size of 512 bytes. On this page this fixed size is referred to as a block.
Note that this differs from the definition of a block (=128KB) displayed on the CTR menu.

Input Parameters
	Save Data Type	CTR Card Save Data
	Protection Type	No automatic redundancy (any save data that is being written will be corrupted if the Game Card is removed ) Automatic redundancy (any save data that is being written will be protected against corruption even if the Game Card is removed )
	Recordable Media	CTR Card Backup Memory (128KB) CTR Card Backup Memory (512 KB) KB
	Max Number of Directories (0-?)	(Total number of directories that can be created throughout the entire file system)
	Max Number of Files (1-?)	(Total number of files that can be created throughout the entire file system)
Amount of Data That Can Be Saved
	Save Data Block Size	bytes
	Number of Save Data Blocks	blocks
	Save Data Capacity	bytes / KB (block size × number of blocks)

This calculates the amount of data used for expanded save data.

With expanded save data, data is managed at a fixed size of 4096 bytes. On this page this fixed size is referred to as a block.
Note that this differs from the definition of a block (=128KB) displayed on the CTR menu.


This calculates the number of blocks consumed in expanded save data. Depending on the SD Card format, the actual memory footprint on the SD Card may be greater than the values shown here. Note that nn::fs::ResultNotEnoughSpace may be returned even if an SD Card has as much free space as the sizes given here.

Metadata

File

2011/02/09

Added notes about the definition of "blocks."

2010/12/16

Added worksheets for expanded save data calculations.

2010/12/11

Initial version.