You can create a checkpoint cache to save copies of the model at different epochs. Saved checkpoints are marked in bold on the plotted graph during training and can also be reviewed in the Training dialog for any training session. Do the following to open the Training dialog, which is shown below:
Training dialog

You should select a per model disk space as per the type of model you usually train and the number of checkpoints you want to save. For example, each copy of a U-Net model with a depth level of 3 and an initial filter count of 64 takes approximately 15 MB, while each copy of a U-Net model with an input dimension of 3 slices, a depth level of 5, and an initial filter count of 64 takes approximately 250 MB.
Note Models will be saved at a checkpoint each time that it has a better score until the cache limit is reached. Afterwards, the model with the lowest score will be cleared so that the new checkpoint can be saved.