this is not really a request, more a proposal to perfect this great plugin.
We have recently made the preservation agreement with Portico, and I was transferring directly from OJS all the back issues in several batches. Unfortunately, the batch zip files are identified by the transfer date only and newly uploaded files automatically overwrite previous files on portico ftp. So, after having transferred 3 big batches, I verified with Filezilla directly on the ftp, and I found that there was only one file. The work-around was to add a number to the filename before uploading a new batch.
I admit that this is an issue that might rarely occur, but it might be interesting for others to know about it.
Have a great day!