Hi @Vijay Kumar ,
High level process for splitting a filegroup into multiple files
- Add several new empty data files to the file group
- Cap the new files so they cannot auto grow
- Empty the original data file
- Readjust all files so they each have the same amount of free space / re-enable autogrowth
- Shrink the original datafile to the same size of the new files
Please refer below link for more details and check whether it is helpful to you. Thanks.
Split a file group into multiple data files
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