Hello Erhan,
Files with names in the format
tx<NUMBER>.sql
would be present in the /store/replication directory which are used for configuration database replication and they are needed.
However, we would not expect to see any .sql files in the /store directory itself. If you are seeing .sql files in the /store directory and not the /store/replication directory, I would check the time stamps for these files and see if they are recent, and if possible track any manual actions done on and around that date.
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