transfer to another SD - and keep image + data separated ?

[kiai72]

How to transfer image + data from one SD to another ? (the "another SD" already has other berryboot images running).
I know there is this backup/restore-feature - but this merges image + data.
So afterwards i can't clear data (reset OS) anymore.
I want to keep image + data separated!
Can't i just copy the files with a linux pc ? I tried, but get permission errors for example at .../data/root, ... or the ".work"-folders.

[symbios24]

There is an option to save the modified image in an img file

[kiai72]

There is an option to save the modified image in an img file

i know. But this creates one single .img-file - when i restore this i can't do "reset OS" anymore.
I want to transfer .img + data 1:1 (separated) to the other SD card.

[symbios24]

Or just duplicate the same image and have it one with the data and one without

[kiai72]

Or just duplicate the same image and have it one with the data and one without

that still not really what i asked for, but ok it's an option. Thank you.