Here is my idea:
I used to store on my ereader only a few books at the time to avoid it to slow down. Then I used to bring with me usb pen with Calibre portable, so that I could use it on every pc to handle my ereader.
How to:
Almost All ereaders (surely kobo and sony) use linux (or android ) os. SO THAT WE CAN USE HIDDEN DIRECTORIES (I mean linux hidden directories and not windows ones) to store inside a complete calibre portable package.then, when we connect the reader to pc we can get inside this or these hidden place and call calibre-portable.exe
To do this we have only to create a linux hidden directory, naming it (dot) name (dot)
For example I use .store.
Obviously we can't create it from a windows pc but from a linux one, following thes3 steps:
1 open memory card driver (Sd inserted into the reader)
2 create a new folder inside it
3 add a file inside it (u can create an empty text file or so on)
4 rename this folder from "new folder" to .store.
5 you will see that now the second dot disappears and the folder is hidden. It means that the ereader won't look inside it to add whatisin to library
Now i copy calibre portabl3 inside it and i am able to run it from every windows pc
The problem:
In this way, when calibre starts it recognize that an eread3r is connected and wants to know what ebooks are inside it! It launches a job to collect book infos and it collects infos about all calibre ebooks!
Well on my sony prs-t3 (but i think that it is the same on other readers) when i exit calibre and restart, my prs thinks to have all these books inside.it thinks a little then makes a check and deletes all library entries about all these books (in .store./calibre-portable/calibre library), even if the files are still in that folder.
On next start on windows pc, all this repeats another time.
The question:
How do I prevent calibre portable to search ebooks on a specific folder inside my ereader??
Is it possible to make this hidden folder (.store.) invisible for calibre portable (windows version) ???
Thx. Maybe this will be useful for someone