There are a number of "file manager" apps that allow an iPad to browse through files in shared folders (presuming you know any password that protects them). The apps I've tried requires that you select a photo blind (no preview) by name and download it before you can see it. There may be some I haven't found that can create thumbnails, but that's going to take quite a while if you have 350GB of photos.
Yeah, I found a solution.
Here're two Apps that operate together : ServeToMe and StreamToMe :
- The first app has to be installed on the iMac, then you configure the directory you're willing to access remotely.
- The second app has to be installed on the iPad, then you indicate the IP-address of the the iMac, and that's all.
And it works!
Hope that this find would be helpful to anyone