In the context of this tool, the PS4 Account ID is the 16 character hex string (example: 01ABB2CDR4EFT5HF) that you see in the filepath when you copy saves from your console to your USB drive. The Playstation Network Username is your PSN username which cannot be used for resigning saves. You can go to your Profile settings page to set a PSN username and the tool will attempt to get your PS4 Account ID that can be used for saves and save it to your profile so you only have to do it once.
First make sure you have a PS4 Save Account ID set in your profile settings. Not your PSN account name, but the 16 digit PS4 account ID you see in the filepath when you copy a save file from your console to the USB. You can select/open/drag and drop the save files directly or open a ZIP file containing the save files pairs. An example of the save file pairs are: SAVEFILE and SAVEFILE.bin. If you open the save files directly the tool will ZIP the files for you. It will resign the save file to your account. You can provide multiple save file pairs in the same ZIP file. Including more files means the process can take longer than usual.
You can select/open/drag and drop the save files directly or a ZIP file smaller than 350 MBs containing your save file(s) and save key(s) pairs: SAVEFILE and SAVEFILE.bin. You can only extract one save file a time for now.
First, select/open/drag and drop the save files directly or a ZIP file smaller than 350 MBs containing the target save to inject into, so this is your save file and save key from your USB: SAVEFILE and SAVEFILE.bin. Then, select/open/drag and drop the save files directly or a ZIP file containing the previously extracted/modified save data to inject. The second set of files should contain the extracted save files and not the original save data, so not the SAVEFILE and SAVEFILE.bin, but the files you extracted using Savely. So using GTA V for example: The first ZIP file contains: SAVEDATASGTA50000 and SAVEDATASGTA50000.bin, the second ZIP file contains the file SGTA50000 (the innner save data you modified after extracting the save data). You can inject 1 file or all files into the save file at the same time. The file injection tool does not support injecting new directories into save files that don't exist in the save already. But it does support injecting new files in the root save directory. This feature will come later.
You can select/open/drag and drop the save file(s) directly or open a ZIP file file smaller than 350 MBs containing the save files pairs. An example of the save file pairs are: SAVEFILE and SAVEFILE.bin. If you open the save files directly the tool will ZIP the files for you. First select the save files you want to re-region. Then select the target save (only select 1 target region save file pair) you want to re-region, so this is your save file and save key from your USB: SAVEFILE and SAVEFILE.bin. You can only re-region 1 save file at a time for now.
You can resign pre-existing saves using your PS4 Save Account ID.