diff --git a/content/tech/HowTo_wipe_HDD_101.md b/content/tech/HowTo_wipe_HDD_101.md
index 0367951..a35a3cf 100644
--- a/content/tech/HowTo_wipe_HDD_101.md
+++ b/content/tech/HowTo_wipe_HDD_101.md
@@ -13,7 +13,7 @@ image = 'https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Fwww.easeus.
 ```sh
 shred -v -n 3 ./file
 ```
-> Thou might not be secure if your filesystem use COW (copy-on-write) (like btrfs,zfs)
+> Thou might not be secure if your filesystem use COW (copy-on-write) (like btrfs,zfs), make shadow copies (windows, ntfs), uses RAID.
 
 ## Secure wipe entire drive
 
diff --git a/content/tech/HowTo_wipe_SSD.md b/content/tech/HowTo_wipe_SSD.md
index 5ed107f..2da089d 100644
--- a/content/tech/HowTo_wipe_SSD.md
+++ b/content/tech/HowTo_wipe_SSD.md
@@ -6,7 +6,7 @@ image = 'https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Fi.imgflip.c
 
 ![](https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Fi.imgflip.com%2F5fold8.jpg&f=1&nofb=1&ipt=57d5a7bd95d2cf08d7a126d00926f244038b58c47a130479233bd079c024a6f9&ipo=images)
 
-If you are using SSD and want to securely wipe it (so no one can recover data), then you are in a trouble since it isn't as easy as with [HDD](/tech/hdd_wipe_101) thou faster. <!--more-->
+If you are using SSD and want to securely wipe it (so no one can recover data), then you are in a trouble since it isn't as easy as with [HDD](/tech/howto_wipe_hdd_101) thou faster. <!--more-->
 
 > Warning: Be *really* sure that you are wiping correct drive. If you are doing it in script, then find your drive in `/dev/disk/by-id` since linux can change `/dev/sdX` after reboot