curl-w32/docs/cmdline-opts/continue-at.md

c	SPDX-License-Identifier	Short	Long	Arg	Help	Category	Added	Multi	See-also	Example
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.	curl	C	continue-at	<offset>	Resumed transfer offset	connection	4.8	single	range	-C - $URL -C 400 $URL

--continue-at

Continue/Resume a previous file transfer at the given offset. The given offset is the exact number of bytes that are skipped, counting from the beginning of the source file before it is transferred to the destination. If used with uploads, the FTP server command SIZE is not used by curl.

Use "-C -" to tell curl to automatically find out where/how to resume the transfer. It then uses the given output/input files to figure that out.