Hello friends…
I am replying to your question,based on the info on your post…
Now if i haven’t misunderstood something…
There is an Acer Aspire that has 32GB of storage (internal) and you want to install Mint on a 64GB SD card (external)…
Have i got that right?
In that case…i suggest you take a completely different approach on the matter…
Use both (internal and external) to set up the system…
I don’t know your “experience level” in GNU/Linux,so i will try to explain with as much detail as i can…
1.Your choice of XFCE desktop is the right one,both on storage space and performance point of view
2.Booting from an SD card can hove serious impact on the performance of the system
Generally an SD card is a storage device with low speeds
To get good performance you would have to use an SD card with high speeds,which implies that you might have to go and buy a new SD card,which to my understanding is not an option based on your “financials”.
If that Acer is an old one,booting from an SD card might not even be possible (i had that problem in a very old Acer machine) or could be “glitchy”
3.I would suggest something i have done in the past…
In my opinion,you should use the internal (32GB) storage to install the root partition (/) and your 64GB SD should be your /home directory
So,if the SD card is actually visible to you during the installation process,choose Manual partitioning,not automatic…
In the partitioning menu,choose the 32GB (internal) as the root partition and format it in ext4.
Then choose your SD card and create the /home partition.
Leave a 2 GB on the end of the partition (just trust me on this)
For example,if the usable space in your SD is 61GB from the 64GB,create the /home partition with a size of 59GB
Generally SD’s are said to be better formatted as an ext2 partition,but you can test it…
I have used SD cards in the past formatting them as ext4 with no problem and you could even try FAT32
Once you have created the partitions,proceed with the installation and when asked where to store the GRUB,choose your 32GB internal device
32 GB is more than enough to store your root partition (/) and now you 'll have the whole SD card as your storage space as /home
If you got the patience and time to try it,i 'd say,go for it…
Anyway,that is my suggestion…take it under consideration
If you choose to test it…Best of luck…