I looked everywhere before I tried this today and found very little info so I thought I'd post my successful dirty flash of LineageOS.
I've been using Unofficial LineageOS on my Note 10.1 (2014) LTE (SM-P605) for a little while now and it has rejuvenated my tablet. Recently I integrated the SD Card (64GB) to internal storage (16GB) and now storage is listed as 73.15GB. However updating LineageOS became a problem in TWRP 3.0 as TWRP doesn't see the 'downloads' folder etc... because the SD Card is no longer external storage and TWRP can't read it, doesn't see it as storage at all actually.
But I solved this by putting the OS and vendor images on a USB drive and used an OTG adapter which TWRP can use. ADB and Fastboot work fine, by the way, with the SD Card as internal storage. As I understand it the ROM, system, vendor, radio, bootloader partitions etc... are still on the 'real' internal storage so my updates have gone smoothly AND I save storage space by not putting the ROM's etc on my device. I run a rooted device so I can set the kernel to permissive and that way the SD Card is recognized on boot as shared storage. Sometimes on reboot it isn't recognized and I have to take the card out and reinsert it to get LineageOS to read it correctly. The only error if that happens seems to be dropbox and photos apps crash at first as they must check the missing area for files at boot. But they work correctly once the card is reinserted.
YMMV
Linuxmon
In my system settings 'storage' is listed now as:
Internal shared storage - 9.93GB used of 14.68GB,
Sandisk SD Card - 14.51GB used of 58.48GB.
For a total of 73.15GB
Running Lineage 14.1-20170422-Unofficial-lte03lte
with latest radio, vendor, bootloader and gapps (Bean, mini).
As a side note; back up your internal storage encryption key on another device so you can decrypt your SD Card later if needed. Just sayin'
https://android.stackexchange.com/questions/145443/how-to-decrypt-adopted-storage
I've been using Unofficial LineageOS on my Note 10.1 (2014) LTE (SM-P605) for a little while now and it has rejuvenated my tablet. Recently I integrated the SD Card (64GB) to internal storage (16GB) and now storage is listed as 73.15GB. However updating LineageOS became a problem in TWRP 3.0 as TWRP doesn't see the 'downloads' folder etc... because the SD Card is no longer external storage and TWRP can't read it, doesn't see it as storage at all actually.
But I solved this by putting the OS and vendor images on a USB drive and used an OTG adapter which TWRP can use. ADB and Fastboot work fine, by the way, with the SD Card as internal storage. As I understand it the ROM, system, vendor, radio, bootloader partitions etc... are still on the 'real' internal storage so my updates have gone smoothly AND I save storage space by not putting the ROM's etc on my device. I run a rooted device so I can set the kernel to permissive and that way the SD Card is recognized on boot as shared storage. Sometimes on reboot it isn't recognized and I have to take the card out and reinsert it to get LineageOS to read it correctly. The only error if that happens seems to be dropbox and photos apps crash at first as they must check the missing area for files at boot. But they work correctly once the card is reinserted.
YMMV
Linuxmon
In my system settings 'storage' is listed now as:
Internal shared storage - 9.93GB used of 14.68GB,
Sandisk SD Card - 14.51GB used of 58.48GB.
For a total of 73.15GB
Running Lineage 14.1-20170422-Unofficial-lte03lte
with latest radio, vendor, bootloader and gapps (Bean, mini).
As a side note; back up your internal storage encryption key on another device so you can decrypt your SD Card later if needed. Just sayin'
https://android.stackexchange.com/questions/145443/how-to-decrypt-adopted-storage