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External data storage

Store pictures, blobs and text outside of the data file.

This feature reduces the size of the data file itself, so that operations that occur on the file happen much more quickly. 4D will automatically manage the storage and backup of the external data. Or, if you prefer, customize it to your own needs and manage the backup yourself. In the latter scenario, you can store the paths to these external files within 4D, which will remain part of the data that uses the file.


Use this to optimize your application’s access to particular kinds of files. For example: Store very large, print-quality images on a large hard drive, while keeping smaller, more used images on an SSD for rapid access. Whichever you use, 4D will always know where to retrieve the files. You may also use this ability when, for example, pictures are shared among different applications.



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