Since it’s impossible to save my collection online with my IPhone I decided to get my old PC laptop and make a local save.
I connected my iPhone 14 to the laptop to upload my collection.

Out of 2824 only 223 were uploaded on my PC.
OK, no big deal, I’ll try again.

The thing is, the same 223 are left on my phone.
Basically everything is gone.
Thank you DVD Profiler.
Good bye DVD Profiler.
I’m done.

Quoting Lowpro (from an old thread):

Quote:
There are 3 options when creating a database with the mobile app, "Connect to DVD Profiler for PC", "Connect via DVD Profiler Online" and "Local Database".  The "Local Database" type does not provide for syncing your collection with DVD Profiler for PC or DVD Profiler Online.  You'll have to change your Connection Type first by selecting the "Databases" menu item.  From the "Databases" screen under the "Databases" option select your database.  On the next screen select the "Change Connection Type" option.  From there you can change your connection type to "DVD Profiler for PC" or "DVD Profiler Online".

If your collection only exists on your iPhone select the "DVD Profiler Online" connection type.

Once you've changed the connection type to "DVD Profiler Online" return to the "Databases" screen and select your database from the "Update Database" option.  From there log in to your account.  Once logged in you'll be taken to the "Select Update Task" page.  At the top of the page there are options to "Upload" from your iPhone or "Download" from DVD Profiler Online.  Below those options you're shown a comparison of the database on your iPhone versus your database online.  Select the "Upload" option.

Once uploading the database from your iPhone you'll have the option obviously to download your online database to your iPhone if you ever need to.  With your online database in place you could then download it from DVD Profiler for PC if you want.  Once downloaded to DVD Profiler for PC you could even start syncing locally between DVD Profiler for PC and your iPhone, occassionally uploading from "DVD Profiler for PC" to "DVD Profiler Online" keeping your online database updated as well.  You'd do this by either creating a new database on your iPhone using the "DVD Profiler for PC" connection type, then downloading your DVD Profiler for PC database to your iPhone or instead change your "DVD Profiler Online" connection type to "DVD Profiler for PC" and start syncing.

So basically you cannot copy your entire phone collection to the PC via wi-fi. It can only be done through the online. Only after that will the wi-fi sync work as intended. If you cannot upload to the online from the phone, then you're out of luck, I'm afraid.