Dave

Hello, Igor. Thank you for the reply. Could you please clarify the following points. 1) 7-zip creates temp file and copieas all new data to that temp archive then it renames it. There is no check that files are same. So 7-zip transfers all data. I want to understand how to reconcile your advice, "There is no check that files are same." with the on-screen output from 7-Zip: Keep old data in archive: 50 folders, 1203 files, 383505325 bytes (366 MiB) Add new data to archive: 0 files, 0 bytes In that...

Hello, Igor. Thank you for the reply. Could you please clarify the following points. 1) 7-zip creates temp file and copieas all new data to that temp archive then it renames it. There is no check that files are same. So 7-zip transfers all data. I want to understand how to reconcile your advice, "There is no check that files are same." with the on-screen output from 7-Zip: Keep old data in archive: 50 folders, 1203 files, 383505325 bytes (366 MiB) Add new data to archive: 0 files, 0 bytes In that...

Hello, Igor. Thank you for the reply. Could you please clarify the following points. 1) 7-zip creates temp file and copieas all new data to that temp archive then it renames it. There is no check that files are same. So 7-zip transfers all data. I want to understand how to reconcile your advice, "There is no check that files are same." with the on-screen output from 7-Zip: Keep old data in archive: 50 folders, 1203 files, 383505325 bytes (366 MiB) Add new data to archive: 0 files, 0 bytes In that...

Hello, Igor. Thank you for the reply. Could you please clarify the following points. 1) 7-zip creates temp file and copieas all new data to that temp archive then it renames it. There is no check that files are same. So 7-zip transfers all data. I want to understand how to reconcile your advice, "There is no check that files are same." with the on-screen output from 7-Zip: Keep old data in archive: 50 folders, 1203 files, 383505325 bytes (366 MiB) Add new data to archive: 0 files, 0 bytes In that...

Hello, Igor. Thank you for the reply. Could you please clarify the following points. 1) 7-zip creates temp file and copieas all new data to that temp archive then it renames it. There is no check that files are same. So 7-zip transfers all data. I want to understand how to reconcile your advice, "There is no check that files are same." with the on-screen output from 7-Zip: Keep old data in archive: 50 folders, 1203 files, 383505325 bytes (366 MiB) Add new data to archive: 0 files, 0 bytes In that...

Hello, Igor. Thank you for the reply. Could you please clarify the following points. 1) 7-zip creates temp file and copieas all new data to that temp archive then it renames it. There is no check that files are same. So 7-zip transfers all data. I want to understand how to reconcile your advice, "There is no check that files are same." with the on-screen output from 7-Zip: Keep old data in archive: 50 folders, 1203 files, 383505325 bytes (366 MiB) Add new data to archive: 0 files, 0 bytes In that...

There are some other discussions on the difference between add and update, but they don't address the above issue. https://sourceforge.net/p/sevenzip/discussion/45798/thread/87ffeac1/ https://sourceforge.net/p/sevenzip/discussion/45798/thread/63da407e/ https://sourceforge.net/p/sevenzip/discussion/45797/thread/83b12d0e/

Background I wrote a batch file to call 7-Zip on each of the non-hidden folders in the root directory of my system drive and create encrypted backup archives on an external HDD. To save time and reduce computational load, I am using only store (no compression). I have tried with both "a" (add) and "u" (update) methods. In both cases I set the functionality to synchronise (per the 7-Zip documentation). Problem Even when there are literally no changes in the source files & folders, 7-Zip still seems...