How to use a command to many files?

There is a command, it deletes non-ASCII characters.
g/[^\x00-\xff]/d
"
1
00:00:01,300 --> 00:00:05,920
玄黄端现，太极混沌如鸡蛋，随着轰的一声,
In the beginning there was darkness... And then... BANG!
----->
1
00:00:01,300 --> 00:00:05,920

In the beginning there was darkness... And then... BANG!
"

I want to use this command to many files(fileA.src, fileB.src), how can I do it?
for example:
folderA/fileA.src
folderB/fileB.src

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