Delete Old files from sdflash on Cisco IE series

[snowbars]

Hi, how to delete old files from sdflash. This is the situation.
I have Cisco IE-4010, version was installed earlier IOS 152-7, I installed the new version 152-8 using the command:
#archive download-sw /overwrite tftp://__my_tftp__/ie4010-universalk9-tar.152-8.E1.tar

The version installed correctly, the old files of version 152-7 were deleted, but even earlier there was version 152-6, and all of their lines remained in sdflash (1900 lines of old + my new 1900 lines). What command can I clean sdflash?
Tried 2 commands, none of them work:
1. request platform software package clean
2. install remove inactive

Is there anything else?

[Ruben Cocheno]

@snowbars 

You probably might want to look at crash files, and other files left behind that usually consume space (large). Removing old logs, config snapshots might be something to consider as well.

You should be able to find those files/folders using dir flash: and check every item individually and remove it carefully.

[Leo Laohoo · Accepted solution]

delete /f /r sdflash:filename.ext

[snowbars]

Thanks, it works. But there is one more question. The command has removed the old lines with their numbers, but the visible numbering continues. those. starts from 2000 to 3900, but there are no first 2000 numbers. Is it possible to recalculate the numbering so that the lines start from 1 again? This is not important, but I would like to do it nicely