This comes up from time to time and depending on luck you'll get people saying it's stupid and just buy another hard drive, or someone goes nerdy and figures ou

This comes up from time to time and depending on luck you'll get people saying it's stupid and just buy another hard drive, or someone goes nerdy and figures out it can be done with conv=notrunc. The top answer uses that as well, just like I did when answering a previous instance of this question on stackexchange (that question was about compressing a file without having to store the compressed version in parallel -- same question different application https://unix.stackexchange.com/a/383019/30731 https://unix.stackexchange.com/a/383019/30731).