You can have your catalog on your computer accessing images from an external drive. You don't need 2 catalogs.
The external drive is a good way to share your files between multiple computers.
The easy thing to do is to put all your images on the external drive,
and import the new images directly to the external drive (no internal drive needed),
and put the Lightroom catalog on the external drive so that you don't need to copy it anywhere.
There are two catches to this since you are using both mac and windows:
- The external drive needs to be formatted in such a way that both operating systems can read and WRITE it.
- Mac and Windows identify the drive differently. Each time you move the external drive to the other computer, you will need to do a "find missing folder" on the topmost folder(s) in the Folders panel.
Thx a lot.
My idea to use internal drive of my macbook is for avoid to go out of home with external drive and the varius risk (Lost it, privacy, ecc...).
The problem with read/write with windows/mac is little big, but: Can I survive everytime with "find missing folder" or i will have risk to lost or damage my photos?
Finding the missing folder is really no big deal. If you have your images organized so that they are all within one master folder then all you have to do is point Lightroom to that folder on the external hard drive on either computer. The only reason you'll have to find the missing folder is that the two computers will probably have different drive names for the external hard drive. It isn't going to damage your images or the catalog. So I don't see any real risk.
My photos are into a only drive ( i rarely use other drive for photos)
My folder tree is this:
X:\lightroom->every event a folder->some events with 2-3 subfolders for video files or other category.
Can be a problem?
What is speed for USB C external box/drive?
Is better 2,5" or 3.5"drive?
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What problem are you anticipating? If the catalog and the images are on the external hard drive and the hard drive has the same letter designation on both computers, you won't even have to find any missing folders because they won't be missing. The only time you'll have to find the missing folder is if the drive letter is different.. And all you have to do is right-click on the top folder, which is Lightroom, and choose to update the folder location. Then you can show Lightroom where the images are. That's all there is to it. Speed of the external hard drive probably isn't all that critical. The processor speed in the computer is what makes the most difference.